Just finished my pulley install on the TA and it runs perfect until about 2500 rpm. Then it begins to miss like it is running on 7 cylinders. It will continue to run this way at any rpm until I shut the car off. When I start it back up it runs fine until I hit 2500. It doesnt matter if I am moving or just reving the car in nuetral. Of course I got a SES light which I checked with the predator but it only told me of random/multiple misfires which I am already aware of. Visually the pulley does not seem to be wabbling and I don't notice any strange vibrations, but then agian I can't seem to go above 2500 to find out. I torqued it down to specs and followed the directions to a t.Any ideas?I would hate to have to pull it back off since it is such a bitch to get off. Is this even a pulley issue or possibly a tuning issue. The car has H/C, Kooks LT's, and predator custom tuning

 

did you unplug anything by accident?

how bout slipping the timing chain when you tightened it?

i say swap it back out and see what happends

 

Check to make sure that every thing is plugged in as it should be.
There's no way to "slip" the timing chain.

Misfires are usually linked to plugs or injectors. I imagine that a lot of vibes could also set that code. Are you sure that the pulley is installed correctly?