ok, heres the deal... I own a 1999.5 Audi a4 1.8Tq

MODS
Airbox MODS
Borla
Giac/k03

Car has 130,000k

Past week at idle I am running very rough. Usually I am at 8000RPM now it is jumping to 1100-1200.

I am running a Cyberdyne AIR-Fuel gauge. usually it's like a Disco Rave party Show..past week I am getting 1-2 NO bars all red indicating LEAN.

I drive my car to and from work daily that's it. sometimes to the movies or for shopping. Just changed oil last month..at first i thought bad gas...so i refilled when i was at 'E" same results.


My friend suggests a CLOGGED FUEL FILTER can cause running lean....true ? not true? I haven't installed a new one yet.

Also----------NO CHECK ENGINE LIGHTS

 

I am guessing you ment 800 rpms? Not 8000rpms, that would be an insane idle especially since our tachs don't go that high! LOL

As for your problem. When was the last time you changed your fuel filter? That could be your problem. If not than I am not really sure. Maybe clogged injectors or something.

Josh

 

lol ooooops yeah 800. I havent changed the Filter since I owned the car.

Which has been May 19th 06

 

well run seafoam through the gas tank first. see if that helps.

 

LINK--to where i Can buy it?

 

autozone or most auto parts stores carry seafoam

 

Unplug your maf and see if things become smoother. Audi fuel filters dont get clogged to the point where you get running issues, it just doesnt happen. Im almost willing to bet my left nut its your maf. Scan for codes, just cuz there is no CEL doesnt mean there arent fault codes.

Seafoam if you want, but its not going to fix your problem.

 

I would assume since its an idle problem you have carbon build up on the throttle body, remove the hose going to the throttle body and see if you have "black" stuff around the throttle valve. If you do, use some throttle body cleaner and open the valve with your hand and clean all that crap out of there, and clean your MAF sensor.

 

But dont do both things at the same time. Try one,and then the other so you know which, if either was the solution. My left nut is on the line here [&:]

 

^^^LOL