I just got a '95 Chevy Blazer 4.3 w/ spider injectors. The car is having an issue with bucking and stalling and not restarting. Basically after being driven for a short time, usually 20-30 minutes the car will die. Then it won't start back up until like a couple hours. I've had the fuel pump and sending unit replaced as well as the fuel filter, and cleaning the injectors. While it replicates the problem, the fuel pressure is usually decent with good quantity but it will jump and decrease spiratically. I'm thinking electronic or cpu issues. But I have had many people claim to have similar problems and the dealer seems incompetent. Anyone have any help? PLEASE MY WALLET IS STARVING!

 

What does the fuel pressure do if you pressurize the system and then turn the key off? How well does it maintain pressure? If it bleeds off, you have a leak somewhere in the system. The likeliest of possibilities is that the FPR is either shot or on its way out. This can be confirmed by pulling off the upper plenum and pressurizing the system.

Always replace the 'nut kit' (internal fuel lines) when doing anything with the CPI unit.