Chevrolet Repair: 1991 Chevy S10 Blazer, chevy s10 blazer, 1991 chevy s10 blazer

Question
91 Blazer with a 4.3L V6, Thottle body injection. I have replaced-fuelpump+filters+injectors+all sensors on throttle body+computer+timing chain+checked distributor advance function. Now for the problem...it idles perfectly but bogs and dies as soon as you start to open the throttle. If you open the throttle VERY slowly it will run up thru the RPMs. But to try to drive it...it dies as soon as you try to put a load on the engine. I'm stumped and so is my local Chevy dealer. They suggested a possible bad cam but I'm not convinced that is the problem since it idles perfectly.

Answer
You NEED to test the fuel pressure, and it needs to be 12 to 13 PSI, whenever the engine is running.
Split line inside the tank, or a bad fuel pressure regulator could be the problem if the pressure is low.
Pinching the return hose can isolate between the two of them.

Van