HELP!!! My 2001.5 S4 began to shudder every now and then which I know to be a misfire. There was no pattern (not during acceleration or bumps). Well I began my 6 hr drive home for Thanksgiving and I felt the shudder and the car turned off!! The misfire is occuring on ALL cylinders simultaneously. Some times it starts back up but about 4 times I had to pull off the high way and wait and try to start it. The EPC and CE light comes on when this happens. The most peculiar thing is that when the car shuts off (or will not start) I hear a clicking noise. The lights do not dim and the battery voltage remains above 12V. The clicking is near/underneath the TBB (Throttle body boot). I turn the key to "run" (not cranking) and it just clicks under there. When the clicking stops the car starts and runs fine. This happened at 9:30PM tonight so I have not had a chance to go and get the P codes. I will post them when I get them. So... What could it be? MAF, Ignition Control Module, ECM ...??? Please HELP!

 

More details... The clicking is on the throlle butteryfly valve that the Throttle body boot attaches to. I unplugged it and it stopped clicking. More importantly there is a clicking behind the dash. I removed the fusebox and looked past it toward the front of the car and saw what I think to be relays. Is a relay involved when controlling the throttle valve? If so which one? Thanks.

 

WHat faults do you have? As far as i know there is no relay for the throttle.

 

second time round check yourown post syxxty and answer those questions

 

I have some more details. I finally made it to advanced auto and I have NO faults so whatever is happening the ECU does not know it or record it. I know that if I remove relay 372 the clicking stops. I think whatever is controlling the 372 relay is at fault. I am also going to be checking the connections behind the relay. I also pulled the relay apart and cleaned the contact and checked the coil for spots. The relay looks fine. SO.. what controls the relay? Thanks.

Dave.. I am sorry that I have posted the same note in 2 places. I am desparate and have Monday and Tuesday to identify what ever part I need and get it (I sure hope they have it in stock!). Please forgive my insolence.