ive got a problem with my 88 firebird cutting out during light acceleration after 45mph. It seems to be down on power and pull alot of timing. Then under light throttle it cuts in and out and chugs/hesitates. This is usually after its heated up (bout 5-10 min of driving).

specs:
350 LO5 tbi
new fuel pump, injectors (55#), fuel filter, replaced TB gaskets and did adjustable fuel pressure mod.

I need a good chip burned for it and i can datalog info.
Most of all i just need some expertise to point me in the right direction. Ill drive out to anywhere to meet and buy a beer or two if somebody will just give it a look and lend a helping hand. Or any shops in georgia thatll do work on third gens?

thanks guys

 

Sounds like a problem in the egr system. I am assuming it has never been replaced?

 

yea egr has been replaced. I tested it out to see (choking it to see if motor dies and yea its good. Brand new.

I was told to check out 02 sensors. maybe after warm up theyre sensing wrong fuel setup and not adjusting air properly. I duno. any word on this?