i got a 91 camaro tpi 305 , and its been the car from heck , it will run when u spray staring fluid in it and run great for about 20 mins then it will start to stumble then stall out ,but it wont start after that ,let it sit a day or two and same thing ,its getting good pressure and volume ,good spark , now its been to 3 good mechanics with atleast 30 yrs exprience each , one guy had it for a year and replaced everything but the motor itself , i ending up getting the car off a women who originally had all the work done , im a mechanic myself but i cant figure it out ive started from stratch with this car , any idea would be great thanks. newbie

 

Bad ground? Sounds like it might be wiring, seeing as how you've replaced everything else.

 

Did you check the injectors with a meter?

 

the wiring that i can see looks ok, and the injectors are new ,and testing good.

 

Whats the fuel pressure at? Whats it at when it dies?
Is there a AFPR on it? If so turn the pressure up and see what happens.
Turn it up to 48psi.

If it starts with starting fluid, and then dies about 20 mins later, you would think it was a fuel issue.

Whats all been changed? Like you said start all over again, just because its been replaced, doesn't mean its not bad again.
Fuel pump, make sure your vent line is not plugged up. (or return line to the tank). It could be starving itself out because its not breathing properly.

fuel filter?