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6 votes
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Best way to remove carbon and gunk build up

Although I've never done this, a trick I've come across involves feeding motorcycle clutch cable with copious amounts of brake cleaner into the blockage, attaching the end of the cable to a cordless ...
Zaid's user avatar
  • 39.2k
5 votes

Need explanation on Commanded EGR and ethanol%

Ethanol % PID is the cars best guess at the ethenol level is in the fuel. This is more common on E85 Vehicles. Commanded EGR is what the car wants the EGR valve position to be at, not all cars have ...
Ben's user avatar
  • 10.7k
4 votes

Possible EGR problem on Fiat Idea Multijet 1.3 Diesel

One possibility is that the turbo is sometimes over-boosting, which is being detected by the engine MAP sensor. The way that the engine ECU can control this over-boost to avoid engine damage is by ...
HandyHowie's user avatar
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4 votes
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Egr valve cleaning (2.0Tdi 2005)

If you take it off of the engine, your best bet is to clean it with carb cleaner. Don't submerge it in anything, as you can cause damage to any diaphragm seals which may be present (if vacuum operated)...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes
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Car stalls on intersection or when coming to a stop

I suspect that this is caused by one of two things although it could be a few more. It is most likely a sticky ISV. The ISV or Idle Stabilization Valve is responsible for allowing just enough air ...
Steve Matthews's user avatar
4 votes

Is EGR valve change necessary?

The glow light flashing and a reduction in power is a classic symptom of an EGR valve problem on VW group diesel engines, so it sounds likely that the mechanic made the right call on replacing it, ...
GdD's user avatar
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3 votes

Is EGR valve change necessary?

Nobody here can tell if your EGR value is irreparable damaged or not. Some valve models are frail and easily damaged, others are quite robust and cleanable until the damage is too big. Most of the ...
Martin's user avatar
  • 8,448
3 votes
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Could a stuck EGR cause better gas mileage?

It depends whether the EGR valve is stuck open or shut. Stuck open would cause drivability issues and decrease MPG. Stuck shut would cause no adverse affected apart from the check engine light (in ...
Newbie Noob's user avatar
  • 2,781
3 votes

Best way to remove carbon and gunk build up

In order to clean it, just remove it This is a messy job. You don't want any of that carbonized waste going into the motor or all over yourself. If you get an automotive parts dip, you can remove ...
DucatiKiller's user avatar
  • 32.9k
3 votes

Best way to remove carbon and gunk build up

There are a number of ways to clean it but I've had personal success with oven cleaner and a tooth brush. Obviously wear protective gloves and do it somewhere well ventilated. Also, throw the tooth ...
Steve Matthews's user avatar
3 votes

After Replacing EGR valve and tube: repeat of code P0401 for 98 Accord V6

Most people just clean the EGR port with a small drill and think they are done. Just inside where the throttle body mounts They are 2 side passages that are often overlooked. I had to bend a wire and ...
Gene clark's user avatar
2 votes

Does Mazda's Skyactiv-G engine avoid EGR altogether?

Vehicles with variable cam timing on both cams don't need EGR in the traditional sense. They vary cam timing to increase overlap during cruise to allow exhaust gasses to partially fill the intake ...
Ryan's user avatar
  • 21
2 votes

BMW E90 M47TU2 EGR clean

Contrary to some other answers claiming that BMW engines do not have an EGR valve, in fact the diesel engines do. Here's a link to the parts catalog showing it, and an illustration on its placement: ...
Johannes's user avatar
2 votes

What effect will removing my EGR have?

You might find this post about Dynamic EGR Control for TDIs on the TDI Club forums by Mark at Malone Tuning interesting. Mark reports on his experiments with the EGR system on a 2006 TDI. He reports ...
dlu's user avatar
  • 14.5k
2 votes

Should the EGR be activated at idle?

At idle, your EGR valve should be closed (read: not activated), allowing no exhaust gas to get into the intake air. At idle, any exhaust blended in with the fresh air might indeed cause your engine to ...
zebonaut's user avatar
  • 171
2 votes
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Rough idle and 02 sensor voltage drops to zero, cylinder 2 misfire

My suggestions for next steps to take: Vacuum gauge testing at a warm idle, is it steady? A running compression test as well. Mechanical integrity should be verified before chasing any bad data ...
Milison's user avatar
  • 634
2 votes

My truck failed emissions because they couldn't find the EGR

The item is circuit is indeed the EGR valve. Nothing more to add, you can quite happily tell the tester that he is wrong.
Newbie Noob's user avatar
  • 2,781
2 votes

Cause of faulty EGR valve

No, they are not connected in any way. The EGR deals with exhaust gasses. They can, over time, get plugged with soot or possibly have a mechanical failure (depending on design). The EGR only comes ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
2 votes
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does we have coolant water in EGR?

No, it is certainly not okay, but I doubt it's coolant. It's probably condensation... ON EDIT: HandyHowie and the OP (Mostafa) are indeed correct. Now that I know what vehicle we are speaking of, ...
SteveRacer's user avatar
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2 votes
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Brand New EGR Defective, wiring harness problem or both?

OK, so the first thing is that the continuity setting on my multimeter doesn't work very well.. I redid the resistance tests using the regular Ohm-meter setting and was able to identify all the pins: ...
Robert S. Barnes's user avatar
1 vote
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Could a bad EGR prevent the Turbo from Working?

So I did some testing and saw that the waste gate actuator is not getting any vacuum on start up. It should be getting vacuum enough to fully close it on startup. I also manually held the waste gate ...
Robert S. Barnes's user avatar
1 vote
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Component Identification / 1995 F150 5.8L 351W

The part you have circled in the first image is the Vapor Canister Purge Valve / Solenoid: I found it here on RockAuto.com (NOTE: I have no affiliation with RockAuto, just showing the information). ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
1 vote
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Opel Zafira A enters safe mode above 3500 rpm

I doubt that I can write an coherent answer but I'll try to bring up some points: Those two marked parts are solenoid vacuum valves. The upper one controls the egr valve. The lower one controls the ...
Martin's user avatar
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1 vote
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Mechanic is recommending new catalytic converters. Are these temperatures that bad?

The EGR bleeds exhaust into the intake, that essentially reduces the oxygen level of the intake which reduces the peak temperature of combustion. The nitrogen oxides are formed at the peak combustion ...
blacksmith37's user avatar
  • 3,698
1 vote

Mechanic is recommending new catalytic converters. Are these temperatures that bad?

Those temperatures are not bad. You might be shocked at how hot things get inside of the combustion chamber. (What with the fire and the combustion and all.) If your cats are achieving a 300*F drop, I'...
3Dave's user avatar
  • 3,149
1 vote

What is exhaust gas recirculation?

I think, there are a few more points, and the differences between diesel and petrol engines. A diesel engine has no throttle and always ingests the maximum amount of air. It varies the amount of fuel ...
sweber's user avatar
  • 7,057
1 vote

Advice for cleaning an electrically actuated EGR valve

Letting the valve soak over night seems to be a common way. Just make sure you only flood the pipes and not the actuator. There are specific EGR cleaning agents (sprays) sold at a lot of places; ...
JimmyB's user avatar
  • 307
1 vote

Is this a good explanation of EGR principles?

True, but the temperature problem applies mostly to diesels. Diesels have a NOx problem due to lean air fuel ratio, and a catalytic converter cannot solve it because there is too little CO and HC in ...
juhist's user avatar
  • 14.6k
1 vote

Car with EGR and without catalyst

You don't state which model you have, so I'm conveying information relevant to the W124, W202 and W210 series. If your engine is a OM602 or OM605, then the EGR is notorious for clogging up the intake ...
PlaneCrazy's user avatar
1 vote

Ford DuraTorq TDCi EGR system (Euro4) operation, blanking

Fords use a differential pressure sensor on the EGR system to detect operation. There are two hoses (one with a slight restriction) coming off the EGR tube and the DPFE sensor. If the sensor doesn't ...
Ben's user avatar
  • 10.7k

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