1PhatAudi

My 2000 1.8T is running horrible at first I thought that I had water in the fuel or a clogged fuel injector but after running the tank to E it doesnt seem to be any better. The power serge happens only when the rpms drop below 2k and revved hard to 4k in 2nd gear the car tremors and shudders as if its not getting sufficient fuel or spark but the car runs perfectly when its idling and not pushed. If I drive it easy the car runs smooth only when I step on it is when the problem occurs. My mechanic had sad that the problem might be the mass air flow sensor going bad and that the computer compensates for the bad sensor. Also the check engine light comes on and then goes out after I the serge smoothes out. Is anyone experiencing the same problems, Or could this be a problem with my APR ECU upgrade.

OldSchool AG

But yes, the MAFs commonly fail. You could try cleaning the element with electronics cleaner.

1PhatAudi

i will try that and see if it helps any thanks

JustJeff

Gee, No, not at 50K, 30, 40 and 70, but never 50K miles

1PhatAudi

i cleaned the mas air flow sensor and still no change i guess ill have to bring it in for service

TTapsale

If not there are several other options. Try www.impex.com Part# 06A906461A FOR MY MODEL 180 . yours may differ but I pointed you in the right direction.

TTschwing

If it runs better (by defaulting to built in Fuel maps), you can bet that's it. I would say there's a 99.82% chance it's a MAF..