1973 Ford F-250 engine rotates but wont start`

Tiny
NEILS
  • MEMBER
  • 1973 FORD F-250
Engine Mechanical problem
1973 Ford F-250 V8 Two Wheel Drive Manual

it made a loud pop noise any suggestions
Friday, October 22nd, 2010 AT 2:45 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
1973 Ford F-250 engine rotates but wont start`

Do below

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/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 packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it.

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/broken or jumped timing
belt/chain.
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Friday, October 22nd, 2010 AT 3:59 PM

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