Just to give some background I have a s5 t2 motor in my gsl-se with sds ecu, all emissions removed, 4 720cc injectors, and a msd 6a box, msd boost retard and direct fire using 2nd gen coil pack and blaster coil for the trailing.

The throotle won't rest on the tp idle adjust screw(pardon the terminology) it will stop around an 1/8'' above it. If i get out of the car and manually push the throttle against the screw it idles fine at around 1000rpm otherwise it typically will idle around 1600rpms. I dont know much about the throttle body its self so i'll use some pictures to explain this next part.

Picture 1 - I noticed that lever seems to rest on a stopper screw at about the same point that the throttle stays open during idle and the screw doesn't seem to be adjustable.

Picture 2 - just a picture of the gap where the throttle set at idle.

If someone could just give me a good diagram of a s5 t2 throttle body I could probably figure it out but any help is appricated.

Thanks
-Steve

 

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I have had the same problem when i upgraded the TB. I purchased a throttle spring. Slapped it on, and it has been working great since. Got it from a local autoparts store.