I am new to the forum. I recently bought an 86 f150, 2wheel drive, automatic, 5.0 v8 with the 302. I got it cheap and drove/limped it home. It has some fuel delivery issues it seems like. Driving on flat roads I can not get it over 35mph. while sitting in park it will rev like normal. when i started to drive up hill it would bog down like a stick shift in too high of a gear. and when your foot is on the gas pedal it seems to surge. when driving down the road and while in park, if you rev the engine and pull your foot off the gas it dies. I cleaned the TB and replaced the TPS. It has new plugs, wires, distibutor, thermostat, radiator, hoses, belts, and battery. Any help or thoughts would be greatly appreciated!

 

It may be a timing issue.

 

checked the timing and its set right. It seems to have 2 in-tank fuel pumps and one in-line fuel pump. It could be a fuel pump? i dont want to shell out $90 a piece on pumps if thats not the problem

 

Does sounds like fuel pressure but I'd check intake gaskets. Throttle body seal stuff like that and check your kick down leakage too

 

Throttle body is sealed. going to disconecct the exhaust pipes tomorrow to see if its a plugged cat. but im not too sure what you mean by the kick down leakage. i will try to google it but any info on here would be great also.

 

Kick down leakage is on some auto trans with OD and fi forces trans in passing gear

 

May be a dumb question but does the EFI model have kickdown linkage? all the pictures and sites i can find mention them coming from the carburetor

 

Maybe carbs only. Not to much on auto transmissions but indoor know they have caused a lot of issues such as lack of power on hills and surging

 

well i will add that to my list of things to check in the next few days

 

Let know how it turns out