here is what i did i tacked it up in first and second gear i hit third and half way through about 5000 rpm my motor stared to spit and sputter it dont smoke i pulled all the plugs out and they all were geting fire the compression is realy good i look over all my vacum lines all good it still starts right up but it reves realy slow . it is a s5 turbo ll on a 91 conv. i dont know what the problem is im lost

 

Punctuation dude...... had to read your post a few times over to see what you were REALLY trying to say.

By "tacked it up" Im guessing you mean accelerate at WOT. Give more info, has it ever done this before? Do you have any mods? Are you running an FCD *fuel cut defender*?

 

no i dont have any mods and it never did this with me before. I just put the motor in a month ago

 

first, did you do the compression test correctly?

most people see 90 on one face of the rotor and think everything is fine, even if you have a small chip in one of your seals and getting 60psi on 2 faces you will have **** poor drivability around town and slow revving.. does the car idle on its own or shake at idle?

second place i would look is for a faulty catalytic converter, exhaust trying to squeeze out of a straw is going to make the engine run like *** so inspecting them might be a good idea. last thing i would check is the turbo, make sure it spins freely, could have siezed up on ya which would make the car run slower than a non turbo 7.

 

does sound like a seized turbo to me