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7 votes

What effect will removing my EGR have?

As a vehicle technician for BMW I can assure that it is good for your engine to get rid of EGR. EGR systems are there to improve the exhaust gas quality and slightly win a few miles on a tank (in ...
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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 ...
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  • 39k
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 ...
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4 votes
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After Replacing EGR valve and tube: repeat of code P0401 for 98 Accord V6

If this is the V6 Accord, it very well could be an issue with carbon buildup again. It seems there was a tech bulletin which was issued by Honda about it for the 98-01 Accord and 99-02 Odyssey. I ...
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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 ...
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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)...
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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 ...
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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, ...
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  • 14.6k
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 ...
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  • 2,742
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 ...
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  • 32.8k
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 ...
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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 ...
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3 votes

VW Golf 2001 Mk4 Diesel ASR Engine Problem

Classic fuel starvation, probably caused by an old, gummed up fuel filter. Replace the fuel filter and purge the injectors (remove them from the head, crank the engine a few times and clean the ...
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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 ...
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  • 7,828
2 votes

Honda FIT GP1 HYBRID 2011 knock

I don't think you replaced the injectors. I think you replaced the spark plugs. Injectors are what spray gas into the combustion chamber, and those are usually replaced or cleaned on older cars. You ...
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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 ...
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  • 21
2 votes

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

I haven't found anything which definitively states one way or the other on the EGR valve for SKYACTIV-G technology. What I can tell you is the purpose of the EGR and because of that why the technology ...
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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 ...
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  • 14.3k
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 ...
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  • 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 ...
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  • 634
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, ...
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  • 12.2k
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 ...
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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: ...
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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 ...
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  • 7,007
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; ...
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  • 297
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 ...
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  • 13.6k
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 ...
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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 ...
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  • 10.7k
1 vote

Seat Toledo engine stalls when warm

This can be many different things ranging from a automatically resetting breaker to overheating electronics to vibrations and loose wires to hydrolock especially if your fuel line is loose and sitting ...
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  • 2,859
1 vote
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Ford Focus with error code P242F (DPF failure)

Update March 2016 Still no errors regarding the DPF. Had an issue with the engine cutting out at high revs after this which I have also solved. Update 21st Dec '15 I've fitted the blanking plate ...
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