1986 Ford F150 Engine is flat when you start out

1986 FORD F-150
146,000 MILES • V8 • 4WD • MANUAL
Avatar
EJZINGA21
  • MEMBER
  • 1 POST
I have an 86' F150 with a 302 FI i have a hesitation and it backfires when i rev the engine it almost acts like a vacume hose isn't connected but i have traced every hose changed the egr valve/ sensor throttle position sensor Idle air control Valve/ MAP/ egr solonoids/ air temp sensors new wires and plugs, new rotor and distrabutor cap and tons of other things and i am totaly stumpped so please help me
Apr 21, 2008 at 6:21 PM
Advertisement
Avatar
BLACKOP555
  • CAR REPAIR CONTRIBUTOR
  • 10,386 POSTS
i would check exhaust back pressure, and ignition timing and along with a fuel pressure check and new fuel filter.

you should run a few half tanks with 1 bottle of seafoam per tank.
Apr 21, 2008 at 8:10 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.