91 Turbo II is cutting out at different RPMs seems to be worse when the car is warm. Seems to only do it under boost, sometimes its a real bad miss to the red line and sometimes it will just cut out 4 to 5 grand. Its died 3 times and I had to let it set for about 15 min before it would start back. and it was getting spark when it was not starting . new fuel pump ,coils.plugs. thanks for any help i can get

 

Ive only had the car cut out on me like that when there was a fuel or spark problem. The fact that you say you have verified spark, and you mentioned having to wait 15 min to start it back up seems to point to fuel.

I'm assuming you replaced the fuel filter when you installed this new pump? (the sock and the engine bay canister...)

Have you primed the fuel system and tested fuel pressure?

Verified voltage to the fuel pump?

Have the injectors ever been cleaned?

 

i will check voltage to the pump and the injectors have not been cleaned.i put the new pump and filter in about 8 weeks ago it ran good up tell about 3 weeks ago when i was at the track.(I got handed by a 5.slow )it just started this all at once. i put a new filter on today after setting on the side of the road for 20 min but then it started fine .the old filter was not cloged