Question about 1996 Ford Crown Victoria

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1996 Crown Vic, Valve noise under heavy acceleration

I have a 1996 4.6L Crown Vic. The car runs smooth, and drives great. The problem I have is under heavy acceleration the valves make a lot of noise I bought the car a few months ago with only 51k. I have replaced the spark plugs, wires, fuel filter, cleaned the throttle body and used injector cleaner. Thanks, Jason

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  • Jason_3210 Oct 22, 2008

    I am using 5W-30 motor oil. The sound could be spark knock. Should I go to 10W-30 motor oil?

  • Jason_3210 Oct 22, 2008

    Thanks for the help!

  • yadayada
    yadayada May 11, 2010

    are you using the correct 10W-30W oil,? this is very important, are you sure this is not ping or spark knock? this is common even on low mile engines.

  • Anonymous Mar 16, 2014

    fuel filter 2006 crown vic

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No use what's in there, but have the engine de-carboned by a Ford dealer, or remove the octane adjust shorting bar located near the ignition module (retards timing 2 degrees), this will in most cases cure the issue unless there is allot of carbon in the cylinders. There are also methods of ing this de-carbon procedure at home, check on the internet for tips.

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Posted on Oct 22, 2008

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