Question about 1990 Ford F150

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Hi-Accidentally touched the wrong terminals of the battery and turns over but will not run. Replaced Alternator and fuseable links, have power to coil power to fuel pump, relay, and ecm relay, turns over but will not start. Everything works, but just will not start.

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  • babbitt44 Mar 13, 2009

    Hi- Thank You,

    What is the best way to test the onboard computer?


  • Scott Clifford May 11, 2010

    i think i can help u.you say u have power to the coil.but do u have spark?also did you try changing the capassator under the distrabtor cab. that is what i think your problem is.

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  • Master
  • 1,050 Answers

This could be very bad, some things that could be fried: ignition module, ecm, voltage reg if it's external, I'm assuming it's internal as you have replaced the alternator.
The first thing I would do is turn on the ignition and go through the fuse block to make sure everything is OK. Then, put a mechanics stethoscope on an injector to see if they're clicking when you crank, if not, the ecm is suspect. You can also pull a plug wire off and use a spare spark plug to check for spark.

Posted on Mar 11, 2009

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