I have a 91 z28 about 2000 miles on the new 350 i put in last spring. Lately it has been starting fine cold but soon as it has been warmed up and turned off it wont turn back on unless it sits for a while. It also seems to shut off whenever im sitting at a light or stop sign or even taking turns when my foot is not on the gas. Recent fixes have been a new batt, starter, ignition module, plugs, wires, and map sensor. Could it be the fuel pump or filter? Any ideas would help because as it is i cannot drive it and would hate to take it to a mechanic if i can do it myself. I also noticed a bit of hesitation when I accelerate that goes away after its warmed up.

Thanks in advance,

Mike

 

Is it a tuneport 350?

Good start is to throw a fuel pressure gauge on there and see what it reads.

Before you do anything, change the filter. I had an issue with my truck where it made 0 power, and was stalling out commonly, new fuel filter and ti felt brand new again.

 

yeah it is a TPI...ill replace that filter tonight and update the post tomorrow. Thanks

 

I would like to see how it comes out for you. Let me know how it goes, I'm having the same problem

 

ok well i got the final word on my car and the stalling issue. After 2 days of work they came to the conclusion it was my ecm chip. They did an injector drop test and those were fine. My fuel pressure was there and cylinder 8 was misfiring. So all in all it was just the damn ecm chip.