Has the. F150 set for a long period.if so the gas is old.add real gas no ethanol with fuel treatment.
SOURCE: Rough Ideal on 2004 Ford Explorer
Open hood and listen for vacuum leak sound. pcv hose is most likley cause.
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SOURCE: 1991 Dodge Daytona Spits and Sputters to a stop.
sound like you have a fuel pump going bad in the tank.
SOURCE: spits and sputters only at low rpms
electrical issus. have you ever replaced the spark plugs and wires? distributer cap and rotor? might be time to do this routine maintenence.
SOURCE: 1985 Ford F-150 Truck (EFI) Fuel Problems
i actually have a 1985 302 efi... there are 2 pumps one one the rail right under drivers door and one in the tank.. there are also two filters... one just behind the pump one the rail.. its actually inside a canister that you open with a oil filter wrench then it has a paper element inside..then there is a inline filter that is actually part of the high pressure line the hose is about 3 feet long and runs from your front pump up to the fuel rail agaist the firewall...this one is really hard to find (Buy) good luck wish i hade a carb
SOURCE: 1989 ford f150 loss of power
1989 is fuel injected, on the intake there is idle air control valve, make sure this is not dirty, also you may want to check the coolant temperature sensor, if the engine thinks it is warmer then waht it is the fuel air ratio will be off and your truck will run bad.
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