what is causing my 1990 ford f150 xlt lariat w/ 5.8l engine only throw one spark from the coil no matter how long i hold the key forward, it will not start?

15

Asked by Aug 24, 2014 at 09:58 PM about the 1990 Ford F-150 XLT Lariat 4WD SB

Question type: Maintenance & Repair

i have a 1990 ford f150 xlt lariat 5.8l v8 4x4 that will not start. It only throws a single spark from the coil to the distributor no mater how long i have the key turned over. I have replaced the computer, ICM, distributor, coil, plugs and wires, cap and rotor button, pickup coil and the fuses are all good nd new. please help me, i dont know what else to do. it was my grandfathers truck and it ran great but stopped one day and never cranked again. im in need of help and i dont know where else to go.

1 Answer

88,775

You are describing the classic Ford TFI module or distributor pickup failure, but check the voltage supply to the ignition coil first, then was the distributor a new or rebuilt? If it was rebuilt they most likely didn't check the pickup coil in the distributor. You can take the module and have it tested, I know NAPA here has a tester, maybe they have one in your area. If the module tests good then the pickup is in failure.

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