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1986 FORD F-250
V8 • 2WD • MANUAL
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MAURICEWAR
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MY 1986 FORD F250 (5.0LTR, FUEL INJECTED) WILL NOT START. I RECENTLY REPLACED THE TIMING GEAR AND CHAIN (LESS THAN 1,000 MILES AGO) AND IT RAN GREAT AFTERWARDS. I HAVE REPLACED ALL OF THE ELECTRICAL COMPONENTS (INCLUDING THE BRAIN), TIMING IT TO MANUFACTURE'S SPECIFICATION (10 DEGREES BTC) AND IT HAS GREAT FIRE THROUGH THE PLUGS. i HAVE INSTALLED NEW FUEL PUMP, FUEL FILTER, FUEL PRESSURE REGULATOR, AND THE PRESSURE IS GREAT. I REPLACED THE SEALS ON ALL THE INJECTORS AND THE INJECTORS ARE WORKING GREAT.

I HAVE FIRE AND FUEL AS SPECIFIED BY THE MANUFACTURE, BUT THE ENGINE WILL NOT START.

YOUR HELPFUL ASSISTANCE WITH THIS ISSUE WILL BE APPRECIATED.


MAURICE
Apr 24, 2011 at 3:11 AM
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RASMATAZ
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Are the injectors pulsing? Not sure use a noid lite on the injector harness-

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.

Apr 24, 2011 at 3:32 AM
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MAURICEWAR
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THE INJECTORS ARE PULSING. THE TIMING CHAIN AND GEARS ARE NEW AND UNBROKEN. THE VALVE AND IGNITION TIMING ARE IN SYNC AS SPECIFIED BY THE MANUFACTURER.
Apr 24, 2011 at 3:39 AM
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RASMATAZ
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Are you positively sure the engine no.1 piston on its compression stroke/TDC instead of being in the exhaust stroke-180deg out
Apr 24, 2011 at 3:46 AM
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MAURICEWAR
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POSITIVE!
Apr 24, 2011 at 3:59 AM
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CJ MEDEVAC
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Just a little hard to understand!

Happy Easter to you!

Raz--No takey over, Just a little double teaming, to get him out of your shop and running! 'sides, ain't much going on for us to do!

How did you arrive a At "TDC" with #1 piston? We must doubt everyone, Even each other! Usually someone missed a step.

A little shot of fuel down the Throttle Body has what kind of reaction, when cranking?

Your Turn

The Medic
Apr 24, 2011 at 12:13 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
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The pressure is great how did you determine is it by a fuel pressure tester or eyeball and thumb method-Give us the reading of the fuel pressure don't matter if the fuel pump is new -they go whacko even new-

When you have all 3 of them -its gonna combust, Medic you have a Happy Easter day mine is over with, time to hit the poncho its raining here-Take charge Sarge see you in a few days -lol
Apr 24, 2011 at 12:28 PM
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