Audi S2 running rich

[kenkawtf]

A couple of month ago i bought an Audi S2 avant -94. The car had a fire under the hood and some cables was broken. Anyway, everything is fixed now, and the car is runnig, but i have one issue. When I push the throttle to the max the car just cut.. its fine as long as I has the throttle at 3/4

[LHD_Kid]

boost leak.... 100%

search the forum for boost leak testing...

[kenkawtf]

I did test it already but didn't found any leaks. Can it have something to do with MAF or the O2 sensor? Or is it like you say 100% a leak?

[kenkawtf]

Btw - what happens if i connect the charcoal canister wrong? I mean - if i plug in the returnline at the wrong spot?

[k.alle]

Do you have VCDS/VagCom?
Where in Sweden are you located?

[kenkawtf]

Do you have VCDS/VagCom?
Where in Sweden are you located?

No, I don't have it. I live in Kramfors, 80km North of Sundsvall

[LHD_Kid]

how did you test for leaks exactly?

[kenkawtf]

how did you test for leaks exactly?

Took of the hose from the turbo, plugged it with a clamp and pressurize it with a compressor .

[LHD_Kid]

you mean where the MAF fits? in which case i guess you should have found sonething.... it held 1 bar ok for a while?

[kenkawtf]

This is a short clip.

[LHD_Kid]

ahhh.... my apologies, i assumed you meant full throttle while actually driving!!!!

[kenkawtf]

ahhh.... my apologies, i assumed you meant full throttle while actually driving!!!!

Same thing when I drive. But the car is exactly the same when I disconnect the MAF, do maybe that's the problem.

[Bosscat]

Hummm -

My S2 was running rich - failed the MOT. After changing numerous items - turned out to be the MAF.
Previous readings showed Lam at 1:0 but spiking upwards and running at 1:27 ish.
After MAF change now running 0.989 to 1:00 and feels generally all round better to drive.
Not saying this is THE answer but it solved mine.
The limitation of data on VAG-COM is problematic at times.

[kenkawtf]

Hummm -

My S2 was running rich - failed the MOT. After changing numerous items - turned out to be the MAF.
Previous readings showed Lam at 1:0 but spiking upwards and running at 1:27 ish.
After MAF change now running 0.989 to 1:00 and feels generally all round better to drive.
Not saying this is THE answer but it solved mine.
The limitation of data on VAG-COM is problematic at times.

I'm pretty sure it's the MAF on my car. Will try to find a new one and see.

[kenkawtf]

I just changed the MAF and the car is running worse than before .When I disconnect the car runs fine except I can't floor it without limping. What else can it be?!