I just had a valeo conversion solid mass flywheel and clutch installed in my 2001 audi tt. The clutch and transmission seems to be find, but when I accerate through 3rd gear the esp light stats blinking like crazy and the car is shuddering. I can feel shuddering in the gas pedal also. If I go to a stop it will be find until i accerlate fast again.

Does anybody know whats going on?

 

are you letting the car warm all the way up before you go into boost?

 

yes, the car is warmed up. But check this out, I unplugged the abs senor on the right front wheel. The abs light and the esp light are always on, but the car is running great. I have ordered a new senor, but it wont be here till middle of next week. I am driving without it for now. Do you think I solved the problem?

 

maybe? I cant tell you for sure. I had my ESP light come on and my car die before and my problem was boost related...

hopefully someone can answer ur ? for you though.

 

I drove the car all day today and its running kick ***, except for the abs light and the esp lights are on. The brakes are a little hard once and a while, but nothing major. The new abs senor will be in wednesday.

If I install the new abs sensor and the problem comes back, what could it be? This should do some eliminating at least.

 

By unplugging the sensor you have turned off ABS (and ESP, and likely Quattro if you have it). That sensor is 99.9% NOT your problem - as it would have given you a hard code like you are getting now. Have you read the codes on your car? You likely have an issue with your longitudinal, lateral, or yaw sensor. It is next to impossible to "guess" the right one, you need the code. Find someone with VAGCOM have have them scan it for you.