1984 Ford F-250 wont start

MUSTANGVIC

MEMBER
1984 FORD F-250
V8
2WD
AUTOMATIC
10,000 MILES

I have recently changed the brake booster and cylinder on the truck. Took it for a test drive and it ran fine. After the 5th attempt to start, the motor would turn but not start. Since then, I have changed the spark plugs & wires, dist cap & rotor, fuel pump and ignition switch. Still will not start. Please help. Any ideas on how to diagnose and fix?

Sunday, July 27th, 2008 AT 12:33 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Do below to determine if its 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. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil, distributor pick-up coil, ignition control module, cam and crank 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

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Sunday, July 27th, 2008 AT 12:50 PM