Hi everyone. I have an 86 Ford F250, 460 7.5L. Heres my trucks problem. I go out to start my truck. I step on the gas pedal one time and let off. I start the truck and it runs nicely at a fast idle. Then it gradually slows down to a curb idle as it warms up. Its a beautiful thing. But when i try to give it the gas or rev the engine it will bog out and die unless you take your foot off the gas pedal. There are no fuel/vacume leaks. Float levels have been checked. Fuel pressure at the carb is 8-9 psi. I just know the problem is in the carb somewhere. I have some pic's but havent figured out to get them in here yet.

 

Possible Powervalve or accelerator pump issue?

 

That would be my guess....

With the engine off, remove the air cleaner and look down the throat of the carb as you
fully open the throttle with your hand. You should see two strong streams of fuel being
squirted into the plenum; if you only see a dribble (or nothing) your accelerator pump
needs attention.

 

Funny pic ctubutis. but u have a flat lol. Anyways, im thinking the power valve inside behind the primary float bowl is the problem too. The truck was setting for a while due to lack of funds to fix and everything else seems fine. I'll check the accellator pump one more time for 2 good squirts and if it's good ill just find a Holly rebuild kit for it somewhere. Thats kinda my last resort. Thanks for ur input too Archion. Your responses are greatly appreciated.

 

Ya, i checked the accelerator pump bu manually opening the throttle while looking down the barrel, had 2 nice shots of fuel in there. I ordered a kit from Holley. Carb is a 4180c. For California emmissions. Kit #3-1346 $58.87, direct from Holley Performance Carburetors, Fuel Injection, and Fuel Pumps. I'll keep uall updated after i get it back together.

 

It was in the carburetor. Replaced it 3 times before finally found one working properly. These holly carbs can be a pain in the posterior.