Question about 1987 Ford Ranger

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Engine cranks but won't start. Fuel pump isn't turning on the on position and no spark going out of distributor. could it be a wiring problem or is my ecm bad?

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  • Mike Butler
    Mike Butler May 11, 2010

    Did you check inertia switch? May have tripped.

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  • Master
  • 6,784 Answers

Check the fuel pumps operational value and, check the fuel pumps fuse and relay. If the fuel pump check out OK, i would then replace the(ecm).

You want to make sure the fuel pump is functional before you replace the ecm. The distributor ha sa on board CMP(camshaft position sensor), that will shut down the spark and fuel pump if it is malfunctioning.

Posted on May 31, 2009

  • Michael Masters
    Michael Masters May 31, 2009

    The distributor ignition system designed by Ford has two distinct
    configurations. The first configuration is known as the distributor
    mounted system, because the ICM is mounted directly on the distributor
    housing. The second configuration is known as a remote mount system,
    since the ICM is mounted on the engine or front fender apron.
    The
    distributor used by this system is sealed and houses the CMP sensor.
    The distributor does not utilize vacuum or centrifugal advance
    mechanisms; the ignition timing is automatically controlled by the
    Powertrain Control Module (PCM) and the ICM.
    Ford calls this
    electronic ignition the Thick Film Integrated-IV (TFI-IV) ignition
    system. The TFI module is also known as the Ignition Control Module
    (ICM) which reports engine position and rpm to the PCM. The PCM then
    determines the proper spark timing and advance, and returns a reference
    signal to tell the TFI module to switch the coil, thereby by creating a
    spark. The PCM used on these vehicles is referred to by Ford as the
    Electronic Engine Control-IV (EEC-IV) module.


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