Failed Victoria Come Back Will Be Together Again Ac Odyssey

Dan Ferrell writes about practise-it-yourself motorcar maintenance and repair. He has certifications in automation and control technology.

Has your EGR valve (your Frazzle Gas Recirculation valve) gone bad? Peradventure. I'll tell you the symptoms below. But earlier you beginning replacing parts, keep in mind that the same engine performance problems that bespeak a bad EGR valve tin also indicate bug in other parts of the organisation. If you don't practise your troubleshooting, you may cease up replacing parts unnecessarily and wasting time and money.

This article volition tell you several things:

the symptoms of a bad EGR valve;
how to kickoff investigating whether the problem is your EGR valve or something else;
what the EGR valve does and how it works;
and the different types of EGR valves.

EGR valve passages plugged with carbon deposits.

Photo courtesy of Moosealope on Flickr

Symptoms of a Bad EGR Valve

Symptoms of a bad EGR valve include:

crude idling or stalling
a smell of fuel
increased fuel consumption
pinging, tapping, or knocking sounds
failed smog test
Check Engine Lite on

Some other symptom you may non see often is a misfire. The misfire is actually caused by clogged passages in the intake manifold.

Carbon buildup from exhaust gases flowing through the EGR valve may restrict catamenia to i or more cylinders. The rest of the cylinders and then will get all the frazzle flow, leading to the misfire.

The intake ports and EGR valve itself may also have carbon deposits. All these passages and ports will need to be cleared.

Valve Stuck Open vs. Valve Stuck Close

Really there are two kinds of bad EGR valves, with dissimilar symptoms. An EGR valve can fail in 2 means: It can exist open up all the time, or information technology tin can be closed all the time.

If the EGR Valve Sticks Open:

This volition cause a continuous menstruation of frazzle gases into the intake manifold. You lot'll observe one or more of the post-obit symptoms:

A rough idle upon starting the engine (that is, when the engine is cold) and sometimes at a finish calorie-free or while looking for a spot in a parking lot (that is, at low engine speeds in a warmed-upward engine).
Stalling when the engine idles.
Increase in fuel consumption.
A slight—or strong—fuel odor while operating the vehicle, because of the increase in hydrocarbons leaving the tailpipe (see the next symptom).
Your auto fails the emissions examination. When the engine is running at low RPM, lower temperatures in the combustion chambers preclude all the fuel from burning, and so the flow of unburned hydrocarbon gases coming out of the tailpipe increases significantly.
The Check Engine light (or Malfunction Indicator Light, MIL, depending on your model) illuminates on your dashboard.
You feel the engine has low power, specially at low speeds.

If the EGR Valve Sticks Closed:

This will permanently block the flow of exhaust gases into the intake manifold. You'll notice one or more of the following symptoms:

A pinging or tapping noise coming from the engine at low RPM (at speeds higher than idle). The noise is the sound of early on ignition of the fuel when it meets high temperatures.
Loud detonations. A 2nd ignition can happen afterwards the normal ignition, and the 2 can combine with plenty power to crusade engine damage.
Your car fails the emission test. High temperatures in the combustion chamber let the excessive formation of oxides of nitrogen, which are released through the tailpipe.
The Check Engine light, or Malfunction Indicator Lite (MIL), illuminates on your dashboard.

Troubleshooting: Is It the EGR Valve or Something Else?

To make things even more complicated, the same engine performance problems that indicate a bad EGR valve tin as well point problems in other parts of the system:

Ringlet to Proceed

The EGR's Job: Processing Frazzle Gases

The outside air picked up through the engine's intake manifold contains close to 80 per centum nitrogen and twenty percentage oxygen, along with minor amounts of other elements. When outside air combines with the fuel and ignites in the combustion sleeping accommodation, temperatures can reach in a higher place 2500^o F (or 1370^o C). Combustion at these temperatures burns the usually inert gas nitrogen, creating oxides of nitrogen (NOx) gases, which cause air pollution and human health problems.

All the same, when the burned exhaust gases are introduced back into the combustion bedroom through the EGR valve, temperatures decrease, inhibiting the germination of NOx gases.

What the EGR Valve Does

The EGR valve is a small component designed to allow the flow of exhaust gases into the intake manifold in controlled amounts. As such, it's a simple valve that closes and opens as needed.

The EGR valve has one single task to do, regardless of the system configuration, type of control and number of sensors: that is, to either open and direct exhaust gases into the combustion chamber, or to close and keep them from inbound.

Whenever you start the engine, the valve comes live and waits in a closed position, blocking the menstruation of exhaust gases.

In one case the engine reaches operating temperature and speed increases, the valve—either through vacuum or electronic command—gradually opens, assuasive burned frazzle gases to enter and combine with the air-fuel mixture inside the combustion chamber. If you deadening down sufficiently or come up to a end, the valve gradually closes and blocks the flow of exhaust gasses. And the process continues for as long as the engine is running.

After you shut off the engine, the EGR valve closes and remains in that position.

Types of EGR Systems

Gasoline and diesel-powered engines on the route today may use one of several different EGR valve configurations.

On older vehicle models, you'll recognize the EGR valve as a round, thick metal disc about three inches in diameter, usually towards the top of the engine and on the side. On these older models, a small-diameter vacuum hose operates a basic EGR valve. The hose connects the top of the valve to the throttle body or carburetor. The valve's metal disk houses a vacuum diaphragm, leap, and plunger.
Later models come up equipped with electronic-vacuum EGR valves inside a small block or cylinder. The valve works the same way every bit in older models, except that an electronic EGR position sensor communicates with the auto'southward computer for better control. You may see electric solenoids continued through vacuum lines to the valve as well.
Newer vehicle models employ electronic EGR systems that may include additional components, fifty-fifty a digital valve that eliminates the need for vacuum command altogether.
A more radical design, implemented in a few models, was the replacement of the valve with EGR jets at the lesser of the intake manifold.
Some newer high-efficiency engines, for example those with variable valve timing (VVT), don't even use an EGR organisation.

Types of EGR Valves

Vacuum-controlled EGR valve
Back-pressure EGR valve
Electronic vacuum-controlled EGR valve
Digital EGR valve
EGR jet (in place of EGR valve)

Locating the EGR on a Corvette and on a Truck

Bad EGR valve symptoms vary and resemble problems in other engine systems. But now that y'all know the type of symptoms a troubled EGR valve will produce, include information technology in your troubleshooting tests. And restrain yourself from swapping components trying to fix the problem before knowing which role is causing you trouble. Nearly of the fourth dimension, you'll just spend time and coin unnecessarily. Troubleshoot your EGR valve and other components.

Exam Your Knowledge

For each question, cull the best answer. The answer key is below.

Which condition does Not point to a potentially failed EGR valve?
- Excessive oxides of nitrogen
- Excessive hydrocarbon
- Excessive hydrocarbon and carbon monoxide
Which of these is Not a symptom of an EGR valve stuck open?
- Rough idle and stalling
- A smell of fuel
- Loftier oxides of nitrogen (NOX) results on emissions test
Which of these is Non a symptom of an EGR valve stuck airtight?
- Pinging or borer
- Loud detonations
- Loftier hydrocarbon (HC) results on emissions test
What else, besides an EGR valve stuck open, can cause loftier hydrocarbon emissions?
- Bad oxygen sensor
- Warped rotors
- Transmission fluid leak

Reply Key

Excessive hydrocarbon and carbon monoxide
High oxides of nitrogen (NOX) results on emissions examination
High hydrocarbon (HC) results on emissions test
Bad oxygen sensor

This content is authentic and true to the best of the writer's knowledge and is non meant to substitute for formal and individualized communication from a qualified professional.

Questions & Answers

Question: I have had my EGR valve cleaned and then replaced in my 2002 Ford Tauras which has 49,000 miles. Now it idles rough and the bank check engine calorie-free came back on. What could be the effect?

Reply: If the problem codes betoken to the EGR, then at that place'south possibly something incorrect in the organisation. Information technology depends on the codes. Brand sure the circuits (wiring) are checked also.

Question: I have a Hino 2011 268, and the SCR malfunction low-cal turns on and off. What is wrong?

Answer: At that place could be an intermittent problem with the SCR organisation. Yous may be able to get the codes. This video may give you lot an thought of how to go the codes yourself:

https://www.youtube.com/watch?v=VLf3dgDlLoY.

Question: If I take a bad EGR valve, will it throw a code for a misfire in cylinder number 2?

Reply: A bad valve most likely will cause a random misfire since it doesn't direct exhaust gases to a particular cylinder. If y'all are getting a code for the number two cylinder, cheque the injector, spark, or fuel issues for that cylinder.

Question: Why would the EGR valve leak oil?

Respond: The oil may come through a seal from the actuator rod which somehow connects to the crankcase ventilation (CCV) organisation. This seems to be a recurrent problem on some models. You may endeavor replacing the EGR valve and see if the problem doesn't return.

Question: My 98 Lexus ES300 has codes po001/po004, tin can the EGR prepare off those codes?

Respond: The description for these codes signal to the electrical circuit that connects the fuel pressure regulator to the car reckoner.

Check commencement for proper connections and corrosion, a leak on the force per unit area regulator or failing pump.

If the fuel rail on your engine has a fuel shut-off, check that one besides.

Question: I tapped my cars EGR valve when the engine was running and automatically it switched off. Afterward trying to start it, it produced a fuel scent and doesn't start. What could exist the problem?

Answer: Probably tapping the valve didn't touch on the engine directly. If the diaphragm in the valve was already damaged probably. If the valve is stuck open up, it can cause a rough idle, stall and increase fuel consumption (fuel olfactory property yous're are able to smell during engine functioning). This other postal service may assist yous test the valve:

https://hubpages.com/machine-repair/How-to-Test-an-EG...

Question: I am driving a Mazda 2 DE. And when I disassembled the EGR, it's filled with water flowing out. My EGR is not water cooled. Thus, in that location shouldn't be water in there. Would this be a sign of leaking head gasket with coolant seeping into the cylinder area?

Answer: If in that location's coolant, you may have a cracked head, gasket or block. Merely there could exist other symptoms as well if this is the example. If you lot found water, this near probable is the steam you lot run across coming out the exhaust (from fuel called-for) when starting the engine, usually in common cold temperature climates.

Question: I got my EGR valve changed. At present my car cabin smells of exhaust fumes when my oestrus is on. What would cause this?

Answer: Check the EGR valve gasket. Brand sure it was replaced and put in place correctly. The valve should be properly installed. Or yous may have an exhaust leak. The fumes are probably going from the engine compartment, ventilation system, and the cowl next to the windshield. You want to fix this as soon as possible. Carbon monoxide is highly poisoning.

Question: I just had the EGR valve and its controller replaced. I was hoping this would plow off the check engine light that goes on and off periodically. Not but did information technology not set up the check engine light, but now my car idles rough at stoplights and sometimes just at idle. My mechanic, when he replaced the EGR valve, said as I was leaving that it might take a little time for the valve and the idle to the light to become uniform? Do you lot know what he was talking near? Thanks.

Respond: I don't know what exactly he means by "for the valve in the idle to the light uniform." But, if he disconnected the battery while working on the EGR organisation, he might exist referring to the machine'south computer relearning its idle and fuel trim strategy, which usually gets erased when power is disconnected. It erases data from memory.

Too, practise you know if he cleared any trouble codes from the computer retentiveness after replacing the valve? If non, yous can go to a local auto parts store and ask them to pull any trouble codes (and so that you can verify the code relates to the EGR system) and have them clear the retention. This could assist. Likewise, you can wait for the computer to relearn the strategy, which may take a few miles. Or you lot tin can check your vehicle repair transmission and encounter if it gives y'all the procedure to perform the idle relearn process.

Question: I have a Crown Victoria that will not stay running unless my pes is on the gas, is information technology the EGR?

Answer: Check the idle air command (IAC) valve for proper functioning or carbon buildup. Y'all'll need to remove it and practice a visual inspection of the valve, as well as the ports.

Question: I take a 2008 Ford Crown Victoria PI. When I press the throttle apace, at nigh a quarter to halfway at lower speeds, my engine hesitates and starts making a fast chattering/flapping audio from the engine bay, throughout acceleration. Information technology lasts about two seconds or less. Then it stops. The car doesn't seem to lose power. Is this a bad EGR valve? At full throttle or higher speeds, it doesn't seem to practise this. It sounds like air escaping a plastic flap valve.

Answer: I'm thinking this is probably a sticking valve or need for adjustment. Besides, an exhaust leak can also cause a borer or flapping sort of racket and a lean condition (engine hesitation) because of the pull of extra air. A vacuum leak may also cause a lean condition under mild acceleration.

Question: The tube/cablevision connecting the idle air mass valve to the engine compresses when the engine starts in a Toyota Corolla 2009 afterward I had an engine change. Can someone please assistance me? Mechanics tell me the valve (cablevision/tube) is weak but the problem persists upon change.

Answer: You may be referring to the air hose air mass sensor boot to idle command valve. If the hose is collapsing, and it'south new, you probably need to buy an OEM office, using also the engine number since you changed engines. Probably you are however using the i for the previous model. Tell the parts person to take a look at the engine and run into if he tin can become the engine number for you.

Question: I have replaced the EGR valve 2 times. Both time the mistake went directly away. And subsequently one thousand miles, the mistake came dorsum. May I know what to exercise at present?

Respond: Ane mutual issue with EGR valve issues are carbon buildup in the intake and/or exhaust passages. Sometimes, carbon builds up deeper into the intake manifold and cause problem. Check too the wiring and vacuum hoses (if applicative) that connect to the valve.

Question: I have a '05 Dodge Ram 1500. When my truck is cold and I bulldoze it and I reach a end sign, my truck stalls and looses power. I don't know if it'due south my EGR valve or something else, but doesn't throw me an EGR lawmaking. What could exist the problem?

Answer: At that place could exist a problem in the fuel system, bad air/fuel metering when the engine is cold. The mutual faults are modest vacuum leaks, unmetered air to the intake, bad coolant sensor, throttle position sensor faults, sticky (open up) EGR valve. This other postal service may aid you with this issue:

https://axleaddict.com/auto-repair/Why-My-Machine-Stal...

Question: I replaced the EGR valve on my 1996 Toyota Camry and it still doesn't run strong, why?

Answer: There could be many other reasons for a lack of power. Probably this other post may help:

https://axleaddict.com/machine-repair/What-Causes-Low...

Question: I have a 05' Subaru with 2.5. Whenever pumping gas, the car would stall or wouldn't restart unless I held the gas pedal to the floor. Now, the car volition run fine for a minute, and then run real crude before stalling. The throttle is unresponsive. I am not finding vacuum leaks. The car has new wires, plugs, coil and fuel pump. The EGR valve seems to get very hot compared to everything else. Do you have whatever thoughts?

Answer: Bank check first for possible pending trouble codes, simply in instance. It's normal for the EGR valve to go hot, but if it's stuck open, it tin cause the engine to stall. Likewise, check the throttle body for carbon build upward around the bore and underneath the plate. Check the throttle position sensor. You may need your repair transmission for this, merely they're not difficult to inspect.

Question: I have a 2007 Toyota Hilux KUN26R. The EGR valve was replaced, but still throwing P0400 code. Why?

Answer: There could exist a problem in the system's circuit. Make sure the valve is opening. If in that location's no vacuum or the solenoid is faulty, the valve will remain airtight. Another common issue is carbon buildup blocking the gas passages. Make sure intake passages are articulate.

This other post may assist in your diagnostic as well.

https://axleaddict.com/auto-repair/How-to-Test-an-...

Question: Why would cold temperature not allow a starter to work?

Reply: Cold temperature affects battery operation. This is the most mutual reason, especially if the battery is old or non operating properly. Brand sure you have the right bombardment (CCA - cold cranking amperage) for your model.

Not using the correct oil for the climate in your expanse can as well affect your starter.

Check for clean and tight connections in the starting excursion, including the battery terminals.

Question: I take an old auto that I take done a lot of piece of work to, and on my style home after a stop light, I hit a higher rpm to shift up a hill. Information technology hit about 3500 rpm, and information technology cut out, and had no throttle command. A few seconds subsequently I had throttle command then it cut out again. So like before information technology came back but it seemed like it didn't have every bit much power as it should. Could that be a bad EGR valve?

Answer: If your automobile has a throttle positon sensor, make sure the point is increasing smoothly, if it skips it can have sometimes the same symptom. This might assist:

https://hubpages.com/car-repair/How-Do-You-Know-i...

Too, bank check the fuel arrangement.

Question: Can an EGR valve pressure sensor stop your car from shifting out?

Answer: Functioning wise, common bad sensor symptoms evidence up as engine hesitation, loss of power or even crude idle.

Question: I accept a 2016 Nissan Navara NP300. Is information technology advisable to block the EGR. I accept heard that information technology is advisable to do and so to prevent engine damage. What is your opinion?

Answer: The EGR prevents the engine from overheating and forming NOx emissions (very toxic). Then it's better not to block it.

Question: I am getting a trouble in the transmission in my Ford Ranger XLT, and the company servicing the vehicle says information technology's the EGR causing that problem. Does the EGR can bear on the transmission?

Answer: The EGR valve affects the operation of the engine and the emission system directly. But in modern vehicles, driveability issues can bear on transmission functioning. The EGR system existence an example of this. And many shops are aware of this issue, specially with GM and Ford models. So, it is possible the EGR system is affecting your transmission.

Question:

I hear a sucking racket in my car engine. What does this mean?

Reply: Maybe this post tin can help:

https://hubpages.com/auto-repair/How-to-Detect-and-F...

Question: I have a 2009 Contrivance One thousand Caravan iv.0 50. It cranks simply will not commencement occasionally. It volition smell gas when this happens. I have changed the WIN Module/Cam and Crank Sensors, merely there is no code in the computer's memory. Tin an EGR valve stop my Dodge Caravan from starting?

Answer: The olfactory property of gas seems suspicious. Too much gasoline is probably flooding the engine. You might want to check the fuel injectors (possibly leaking) and fuel force per unit area. This post may help you:

https://axleaddict.com/auto-repair/How-to-Exam-a-F...

Question: I accept a 2009 Ford Focus 2.0. It starts bucking betwixt 2500 and 3000 rpms. It runs fine when the EGR valve is disconnected. I replaced it to no avail. I also cleaned the MAP sensor to no avail. The EGR seems to open and close chop-chop when I have light pressure on the accelerator. There is no "bank check engine" light. Is something upstream causing this?

Respond: There could be a trouble with the DPFE sensor; it looks something like this:

https://www.samarins.com/diagnose/sensors/dpfe-sen...

It could be a switching valve trouble (vacuum supply problem).

Fifty-fifty if the CEL (engine light) doesn't come on, check for pending codes.

Question: I take a 1989 Buick LeSabre 3.08, and it volition backfire in the intake manifold. It can also exist hard to kickoff like information technology's non getting gas, but once started it runs bully. Could this exist the EGR valve?

Answer: You might want to check this post:

https://hubpages.com/machine-repair/Engine-Backfires-...

Question: Can a vehicle lose power if the EGR valve is bad?

Respond: Yep, it's possible.

Question: Can a bad EGR valve crusade my vehicle to buck on acceleration and so stall out?

Respond: There could exist several reasons for this, bottleneck fuel filter, problems with the ignition system or fuel system.

Question: I have a 2006 Audi A4 TDI. When I'chiliad about 1300m above sea level, the auto operates fine, simply when I become to the coast, the auto loses power as if the turbo stops working. I accept taken it for Diagnostics with Audi. They say the EGR valve needs to exist replaced. Does this sound like the cause of the trouble?

Answer: The EGR system does demand to have a specific calibration to respond quickly to changes in demands to the force per unit area level in the intake system. In this detail case, it's difficult to tell if the EGR system is the ane affected more by the difference in force per unit area, merely certainly, it is possible.

Question: Can I exam an EGR valve by compressing the diaphragm and holding my finger where the vacuum line goes to encounter if it holds force per unit area?

Answer: Yep, it is possible. Just make sure non to damage the diaphragm.

Question: I had an EGR valve fail last week with the P0404 code. I replaced the EGR valve, and it was loaded with carbon buildup. I blew the area to try to become rid of the carbon and and then sprayed cleaner (carb cleaner) before putting the new role on. It drives WAY ameliorate now, simply the Check Engine light simply came on again a calendar week afterward and now is throwing the P0420 code, Catalyst system efficiency below threshold. Could it exist cat failing because of all that carbon?

Reply: Make sure this is the merely code the computer is throwing; otherwise, look start into the other codes. A blocked EGR valve tin can crusade combustion temperatures to ascension, creating a lean status and raising exhaust temperature. This prevents the cat from working properly. If the EGR issue has been fixed (intake and valve passages clear, and the temperature is back to normal), try immigration computer codes every bit a P0420 can exist the result of the previous upshot.

If that doesn't fix the trouble, information technology'south possible the cat or ane or more O2 sensors are covered with carbon deposits. Sometimes a true cat cleaner will practice the task, but you need to bank check if the sensors are notwithstanding working correctly. Otherwise, the trouble with the cat is more serious.

Mayhap this other post tin help:

https://hubpages.com/auto-repair/How-to-Cheque-an-O...

Question: I've got the symptoms of a vacuum leak; aka high idle and no ability. The car is idling at 1500 to 2000 rpm. Could the EGR cause this problem? I can non notice any vacuum leaks, and the EGR is the only component that I haven't changed yet.

Answer: The EGR gasket may leak. If there are no other symptoms, the source could be somewhere else. Become the codes from the ECM first. The idle air control valve is another possibility. This one is easy to remove and check. Cheque all vacuum hoses with a piece of hose to listen for noises around the engine.

Question: I have a 1986 Dodge Ram D150 that'south been sitting for years. I got it started today, and there'south fume coming from underneath the EGR valve. Any idea of why this is happening?

Answer: The EGR valve gasket is probably leaking, allowing exhaust fumes to escape. Remove the valve, clean buildup effectually the valve and passages, if whatsoever, and replace the gasket.

Question: My auto lost all power and would not beginning with the turn of keys. The "EGR" warning light came on the dash--does that mean that my engine needs replacing?

Respond: It could be the valve itself or something in the circuit. Go the trouble code and encounter if it points to the valve. Even if the valve seems to be at mistake, it's a good idea to examination the valve. Sometimes another related problem may make the ECU 'recall' that the valve is at error.

Question: I changed the plugs of my 1998 Ford f150 5.4, and then the "check engine" light checked. The shift solenoid B and EGR vacuum regulator is wrong. Could one of these codes brand the truck vibrate and run like I have bad plugs?

Reply: Usually, a bad shift solenoid tin can cause hard shifts, cause the truck wiggle when shifting, or shift erratically. Ofttimes, a bad EGR vacuum regulator can touch on ability and increase emissions.

Question: I accept a 1996 Acura and the trouble code reading was for the EGR valve. Volition a bad EGR valve cause white smoke? The car drives fine and a light fume comes only when I'yard at a red low-cal. And then accept off I can meet sparse white smoke. What does white smoke mean?

Answer: Usually, white smoke is associated with coolant leaking into the exhaust stream, while black fume is oil getting into the cylinders from a bad piston band, faulty valve seals or PCV system. This other mail may aid:

https://axleaddict.com/automobile-repair/Exhaust-Color-S...

Question: I have replaced the starter, alternator, fuel pump, spark plugs and wires on my 1998 Jeep M Cherokee, merely it nevertheless won't kickoff or it dies when it does. What else should I do?

Reply: Check the fuel pressure and compare it to specs. You'll need the repair manual for your model.

Question: I have a Passat B6 1.6 FSI. The bank check engine low-cal is on. I checked it on the reader and it says at that place is an EGR trouble, and then I inverse information technology with another one. I drove my auto for 100 km, and so the light went on again. I inverse it again, and the same thing happened. What should I do?

Answer: Check the definitions for the trouble codes; also, a common problem with EGR valves are the passages. Once you lot remove the valve, you need to bank check/make clean intake passages from carbon deposits that might be obstructing exhaust period towards the chambers. If there's an obstruction problem, the CEL will keep coming on.

Question: Why is there a recirculation of exhaust gases in a car?

Answer: Information technology reduces the amount of harmful emission -- oxides of nitrogen (NOx). When y'all mix exhaust gases with the air-fuel mixture, the temperature drops a little bit. This also helps avoid pinging or knocking.

Question: I take a Jaguar XF. The computer states I have a faulty EGR Valve. The merely symptom I have is the car won't do more than than 50mph (ca. eighty km/h) no thing how much I accelerate. Is it the ERG valve as the engine warning light comes on subsequently almost 30 minutes?

Answer: It's better to exam the EGR valve and brand sure there'south where the trouble is, fifty-fifty if the estimator points to the valve. There could be another problem causing the reckoner to go into limp or safety mode to preclude more impairment. Yous may need your vehicle repair manual to exam the EGR valve.

Question: I have an '87 Nissan Hardbody D21 2WD standard shift. It'south got the 2.4L Z24 TBI. My EGR system, I call up, has caused head gasket damage. Could the EGR system damage the head gasket? I wanted to brand sure it would exist OK to delete the system. I'thousand likewise going to repair the caput gasket now. What's your opinion of the difference between the Blue devil head gasket sealant or thermal gasket? I just bought the truck a few weeks ago.

Answer: A stuck-close or clogged EGR tin can increase engine temperature. If the problem leads to detonations, it tin can impairment the engine. So information technology's possible. This problem is more common with EGR cooler failures when it causes loose of coolant. I personally wouldn't recommend deleting the system. It may lead to engine overheating, increase emissions, and driveability issues.

Aftermarket head gasket repair products tin can do the trick if the damage is not extensive. Notwithstanding, the repair might non be permanent. That said, I've known of people that have some success with Blue Devil and Steel Seal. You may want to practice some research and run into which will work best for the blazon of head gasket you are using in your item application.

Question: I have 99 Chevy 1500. It gave a P0404 code. The guy said EGR valve merely the symptoms don't match. It is just hard to outset. Turns over but takes 10 tries sometimes. Earlier only when information technology sat for more than then 10hrs. now volition exercise information technology even if it was started an 60 minutes before. Sometimes it starts after 1 or ii but sometimes it will impale the battery trying. But once it starts it is perfect placidity as a mouse smooth. Doesn't cutting off. Is that an EGR valve or why would information technology give p0404?

Answer: This is an electrically controlled valve. The trouble could be in the circuit. Just the valve can be sticking open, which is reported to the PCM. Yous may want to try offset removing the valve and checking for carbon buildup. The valve tin can exist checked with a browse tool and testing excursion voltages and grounds.

Question: I accept a Dodge Quotient ii.0 CRD. Information technology is running at nearly 150kph, and of a sudden lost engine power with no heave. Could it be an EGR fault?

Answer: It seems similar force per unit area born the tank (probably a suction control valve problem). Sometimes releasing the fuel cap tin can assist.

Question: I accept a 2002 Ford Escape. I changed the EGR valve considering it was getting hot and smoking and the rpm would go up only no ability. The new i is doing the same thing. What else could it be?

Reply: The EGR could exist stuck open up. If the engine is fed exhaust fumes continuously, this can overheat the valve, cause poor dispatch. Check the EGR organisation and meet if a bad vacuum solenoid is keeping the valve opened. Cheque the command circuit as well.

Question: I have a 96 Honda Borough bucks and information technology slips while trying to take off?

Respond: Check the transmission fluid, level and quality - there could be some manual problems.

Question: What other symptoms can crusade an EGR valve to testify that it's bad or, in other words, causing the engine lite to stay on?

Reply: Possibly the EGR valve/intake passages are clogged, or there's a trouble with the EGR system circuit. These other ii posts may aid:

https://axleaddict.com/auto-repair/How-to-Exam-an-...

https://axleaddict.com/automobile-repair/EGR-Valve-Clean...

Question: Why is my car making a whining noise after I changed the EGR?

Answer: Cheque the EGR gasket under the valve. Information technology is probably a leak. Torque the bolts to specs. Make certain the gasket is skilful though.

Question: Can the EGR valve exist airtight with a plate on a Duramax Diesel fuel?

Reply: It can be washed with a blocker plate, if you find a reliable store to do it. It's possible that y'all'll need to make clean the valve one time in a while if oil from the PCV valve begins to accumulate.

Question: My '96 Tahoe develops a front to rear jerking coming from the engine bay at highway speeds and nether constant speed, not accelerating or decelerating. When I unplug the EGR wiring dongle the problem disappears. Whatever thoughts on this?

Reply: The EGR valve may be getting stuck from carbon build up. The jerking you are feeling is probably a vacuum leak. More air entering the engine is upsetting the corporeality of fuel the reckoner call up it really needs. Cheque the valve and passages for carbon buildup. Probably other components in the system may exist causing this too.

Question: Would a bad EGR valve cause a car to lose power and emit white smoke that smells similar fuel?

Answer: Unremarkably, white smoke is associated with coolant leak into the engine. This other post may requite more than information:

https://axleaddict.com/auto-repair/Frazzle-Color-S...

crosslinhoremill.blogspot.com

Source: https://axleaddict.com/auto-repair/Bad-EGR-Valve-Symptoms-and-What-to-Do-About-Them

Failed Victoria Come Back Will Be Together Again Ac Odyssey

Symptoms of a Bad EGR Valve

Valve Stuck Open vs. Valve Stuck Close

If the EGR Valve Sticks Open:

If the EGR Valve Sticks Closed:

Troubleshooting: Is It the EGR Valve or Something Else?

Read More than from AxleAddict

The EGR's Job: Processing Frazzle Gases

What the EGR Valve Does

Types of EGR Systems

Types of EGR Valves

Locating the EGR on a Corvette and on a Truck

Exam Your Knowledge

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