1987 Ford F-150 starting

SEALEVEL

MEMBER
1987 FORD F-150

Engine Mechanical problem
1987 Ford F150 V8 Four Wheel Drive Automatic

In the morning, first start is very difficult. Engine turns over forever never even fires. Then out of the blue starts up and runs great. Will restart. Hours later once again difficult to start.

New fuel pumps in front tank and near motor. New wires and distributor cap. Other than starting runs great.

thanks, R

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Next time it refuses to start do below this will tell you whether its a fuel or spark problem

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light.

Fuel pump and Injector/s checks out-start checking the ignition system-power to coil, coil/s itself, distributor pick-up, control module, Cam and Crankshaft sensors.

If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems with compression and valves opening and closing at the wrong time