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-   -   97 A4 2.8q EGR question. (https://www.audiforums.com/forum/b5-models-69/97-a4-2-8q-egr-question-143617/)

Audi4.2Q 12-30-2009 05:18 PM

97 A4 2.8q EGR question.
 
I stop at a red light and all of a sudden my RPM starts to jump up and down. A few seconds later the check engine light comes on. I disregard this light because the car seems to be running good once it gets up to speed (still have the fluctuating RPM problem at idle). Today(about 2 weeks later) I was not too busy, so I decided to check it out. The OBDII reads EGR Flow Insufficient. After doing some research, as well as talking to some mechanics, I found out that it is possible to clean the EGR valve. This is where the problem comes in. I have no clue how I am going to unscrew the EGR from the pipe that connect to it on the bottom. there's like NO room at all. Has anyone done this before? Can I have some tips on how to get it off without damaging it?

Thanks

aledelic42 12-30-2009 08:52 PM

same thing happened to my car. I don't know how to remove the valve without buying a crow's foot wrench (22mm). 7/8" is easier to find and works ok too

Mr. Phil 12-30-2009 09:08 PM

i have the same problm... its annoying, sometime the idle drops so low all the lights on the dash come on and the car is happy again lol... u think seafoam could fix it? lol

dragonrage 12-30-2009 10:52 PM

The valve will pretty much have to come out. Soaking it in Sea Foam will probably cure it.

Mr. Phil 12-30-2009 11:38 PM

can u take a pic of it so i know what im taking out lol

CCA4 12-31-2009 11:05 AM

I have the same problem lol.

I'm told the easiest way to get it off is to jack up the driver's side front, remove the wheel and inner fender liner, un-do the fitting at the bottom end of the metal line the valve is attached to, and take them both out the top as one piece. But I'll go to hell before i do that in a slushy parking lot in January lmao. It can wait.

Mr. Phil 12-31-2009 11:19 AM

im not allowed to... the rules of the apartments lol

CCA4 12-31-2009 11:21 AM

yeah i'm not "allowed" either but its only illegal if you get caught ;)

paying $100 a pop for oil changes gets real old real fast

Audi4.2Q 01-08-2010 03:18 PM

Hmmm, thanks a lot. The weather around here isn't too good either so I think I'll wait for the winter to pass or for a sunny day so I don't freeze my ass off laying under the car.

P.S. I think I'll turn this project into a DIY. I'll provide step by step instruction and add photos to each individual step.

MrFlippant 01-08-2010 03:35 PM

Funny story, I've had that exact code for a while now, and just this morning it was acting up for the first time in a while. I'll get around to it.

ImTheDevil 01-08-2010 06:12 PM

On my friend's 96 12v, we took off the throttle intake pipe leading to the throttle body, and cleaned out the throttle body and the two inlets (there was a lot of sludge there) and that fixed his EGR problem (same code definition). You could try doing that and see if that gets rid of the CEL.


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