[chuck_123go]

At high engine speeds the engine would stumble and back fire. I put in a new distributer cap and rotor,new air fliter, new fuel fliter, new sparck plugs and wires, adjusted valves and checked ingnition timing. The truck no longer backfires but stumbles and almost stalls when I give it lots of throttle after it's been running at high speed for a few minutes. Anyone can help I'm running out of ideas.

 

[superjoe83]

Its possible that your fuel pump may be gitting a little tired and cant keep up with the fuel demands

 

[slacker]

I would think , hi speed circut .. might be time for a carb overhaul .

 

[chuck_123go]

Truck's got 150 000 miles on it I'll try getting a new pump. Carb was overhauled last spring but I'll check the hi speed circuit

Thanks Guys

 

[comaToy]

did u ever figure it out chuck_123go????...im having the SAME problem! well if u could help that would be soooo awesome!!! ohhh yea im not gettin any fuel from the return line from the fuel regulator....