Question about 1997 Ford Expedition

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1997 expedition engine pinging on accelleration

It idles good just when accellerating engine pings.,4.6L

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  • Dar
    Dar May 11, 2010

    Have you had the timing checked? Timing chain?

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  • Ford Master
  • 783 Answers

There are alot of things that could cause pinging but the most economical and easiest thing to try first is to clean the MAF sensor.Remove the MAF and clean the sensor bulbs with a good electrical cleaner and light shop air or just let it totally air dry then hook it back up and do several wide open throttle burst to reset the baro readings.

Posted on Feb 18, 2009

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I am told the timing chains are loose. The engine makes almost pinging type noise when accellerating at low speeds or uphill. How is this fixed and at what cost? What if problem is left unresolved?


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