Question about 1997 Ford F250 SuperCab

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Runs on 4 cylinders on drivers side.unplug harness on passingers side didn't change anything.it isn't showing any codes. has a new fuel pump.

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  • dls4009 May 11, 2009

    it is a diesel . doesn't have distributor or plugs

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I would begin by doing a basic tune up (plugs, wires, cap and rotor). The fuel pump is likely not your issue. If the basic tune up doesn't help I would remove the ignition module from the distributor (this requires a special tool). Have it checked at your local parts house, usually free of charge. If it tests ok, reinstall the ignition module. At this point the vehical will probably need to be taken to the dealer and hooked up to a full diagnostics system (DINO). What will be looked for is a bad PROM inside the ECM or a bad ECM overall. Without it's component to computer connection an ECM can give false readings and tell the engine and it's sensors to do the wrong job. This is critical in the diagnosis of a full bank failure. Hope this helps, good luck!

Posted on May 11, 2009

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