Question about 2006 Ford Freestar

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Ford Freestar 2004, 3.9L V6, While on vacation, oil return hose got a hole in it, which caused lurching. Had to drive for a few days to return home since mechanics couldn't locate problem. I later fixed problem but had misfires so I replaced coil, plugs, wires. I still have misfires and now a clicking noise is coming from front of engine. Is the problem related to fuel injectors, oil pump/pressure, ignition timing? What should I do?

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  • stephencarli Sep 12, 2010

    I ran the diagnostic yesterday after installing coil, wires and had no faults . Check engine light is off. Any ideas on the misfire? In addition I now get a small shock when touching the engine. Multimeter shows fluctuating voltage to about 4 vdc..

  • stephencarli Sep 13, 2010

    Ginko
    I ran the diagnostic and found that the #5 cylinder was misfiring intermittently. I checked the plug wire and found it was not securely fastened. I seated it properly had no more shocks and the car works fine now....

    Thanks for the suggestion.

  • stephencarli Sep 13, 2010

    Yes, I ran the diagnostic and checked the wires as suggested and found the fault.
    thanks,

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  • Ford Master
  • 19,396 Answers

Hi.

If by clicking noise you mean typical knocking coming from the engine, that is caused either by valve problem or by a bad knock sensor.

I suggest driving to nearest garage and doing an OBDII code scanning, then coming back to us with the codes.

The scan is done for free at the nearest Autozone, or can be done at any garage for a small fee.

Posted on Sep 12, 2010

  • Ginko
    Ginko Sep 12, 2010

    Re:"Any ideas on the misfire?"

    Read my second comment first, I think you should change distribution wires

    If misfire is not happening regularly and recurrently, this can be an incident caused by any possible reason. Even when cranking and pushing too much on the accelerator pedal you can flood and incidentally cause multiple misfires. A different thing is when you keep getting a misfire code on a single cylinder. In that case problems are either related to distribution or to fuel delivery. Spark plugs, coils, wires from distribution must be tested on the distribution side. On fuel delivery fuel pump, fuel pressure, injector, wrong mixture caused by engine managment problems (injection), valve problems can cause misfires.


    " In addition I now get a small shock when
    touching the engine. Multimeter shows fluctuating voltage to about 4
    vdc.."

    4 V dc won't shock you. It would be interesting to know across what you did read the voltage. The engine is connected to ground, and must have 12V with battery terminal (positive). Check engine earthing. If you get a shock that really hurts, that is discharge leakage from distribution. It may come from spark plugs wire (commonly) or may occurr because a big gap one of the sparks is discharging on engine block (uncommon). Check distribution coils, wires and plugs. If te engine is using a battery heater, that can also cause energy leakage to engine block.

  • Ginko
    Ginko Sep 13, 2010

    Hi.

    Thanks for the update, I was offline.

    I am glad to know that you found the part responsible for the problem.

    All the best.

    Ginko.

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