car dies after foot is off gas

[copteaser]

I just finished rebuilding the engine, TRW forged pistons (40 over) ported heads, 218-218 cam (20 degree race chip), 50 lbs injectors, TE-45 (a)power plate, 3inch stainless steel down pipe and an adjustable fuel pressure regulator (42lbs).

My problem is that the car dies after a burn out or if I suddenly let the foot of the gas pedal after a hard acceleration.
Any suggestions into how i can fix this problem?

 

[Lee Thompson]

?

Maybe a bad or lazy IAC. Try running the idle screw in.

 

[MARINES185]

this is fairly normal especially if you step on the brakes hard
after a burnout. whats happening is while your doing a burnout
the boost and rpms are relatively. once you let out of it the
sudden closing of the throttle blade causes the boost to hit
it and it bounces back against the turbo actually stalling the
turbo. the best thing to do after a burnout is don't slam on
the brake or keep your foot on the throttle lightly. even my
natural aspirated truck does the same thing. it just has to
do with closing the throttle quickly. if its just doing this while
your down the road then you might have an iac problem.