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jenior71 -> RE: 93 f250 won't start (5/17/2008 9:22:59 AM)
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WHAT YOU CAN DO IS TRY TO KEEP IT RUNNING AT IDLE AND REMOVE A SPARK PLUG WIRE ONE AT A TIME EITHER FROM THE SPARK PLUG END OR AT THE DISTRIBUTOR. SEE IF THERE IS A CHANGE IN THE ENGINE. USUALLY , WHEN AN ENGINE HAS A REALLY BAD MISS YOU MIGHT HAVE A BAD SPARK PLUG WIRE AND OR A BAD INJECTOR. IF THERE IS A CHANGE AT A CERTAIN PLUG HOLE YOU HAVE NARROWED DOWN THE PROBLEM, BAD WIRE, INJECTOR, LOSS OF COMPRESSION, STUCK OPEN VALVE ETC. YOU HAVE TO START WITH A COMPRESSION TEST AT THE SUSPECT HOLE...IF THERE IS NO REAL CHANGE IN THE IDLE WHEN REMOVING THE SPARK PLUG WIRES THEN CHECK YOUR FUEL PRESSURE. SHOULD BE AROUND 50 TO 60 LBS. COULD BE A BAD FUEL PUMP..HAVE YOU CHECKED YOUR FUEL FILTER. A REAL CLOGGED FILTER WILL CAUSE ALOT OF PROBLEMS ALSO. HOPE THIS HELPS.
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