ohio5.0

OK here's what's happening.... Car starts and idles fine. Then when I drive down the road and hit the gas it acts like it wants to stall. It even does it just sitting still when I rev the engine. It reaches 3000 rpm the it starts running rough. I've got around 35 psi at the rails and it rises a little when i rev it up to maybe 40. I have a brand new MAF sensor on it, and a new ICM. I have checked out the TPS according to hanes and everything I read it's fine. Even though the check engine light does not come on I pulled the codes...everything checks out fine. I have replaced the plugs, stator, cap and rotor, and rechecked the timing it's at 10°. It's driving me nuts...is there another sensor I should check? Help please!!!

whiteout 5.0

Over fueled? What does it sound like when its dying? backfiring out of the throttle body or just knocking...i need a better description.

ohio5.0

I just sounds like it being choked out. I have the air filter duct work on so I can't tell if it’s backfiring out of the throttle body. I will check tomorrow. I may even be able to get a sound clip for you.

95w.i.p

i kinda had tha same problem, i had to replace the egr, iac, aand clean out the throttle body. U could try cleaning out those parts before replacing them. i have 76 on tha clock

TwotoneVert

I never had a problem with the IAC choking out, it only idled high. You may have a vac line off or broke somewhere.

whiteout 5.0

any smoke?

10732gt

my car is a 1991 gt doing the same thing changed all the same things you did and put a 255lph fuel pump in still no luck so at this time i am pulling the engine
and goin threw it all to see