1984 Ford F250 wont start

1984 FORD F-250
10,000 MILES • V8 • 2WD • AUTOMATIC
Avatar
MUSTANGVIC
  • MEMBER
  • 1 POST
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?
Jul 27, 2008 at 12:33 PM
Advertisement
Avatar
RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 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
Jul 27, 2008 at 12:50 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.