Question about 1999 Ford Crown Victoria

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Engine knock 1999 ford crown vic

Engine knocks during hard acceleration but not during normal acceleration.

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  • Anonymous Mar 12, 2014

    I have a 1992 ford crown Victoria. It has started making a VERY loud squealing whistle upon acceleration. if you are driving it is squealing but not when ideling

  • Anonymous Mar 22, 2014

    one day my car was running fine and the next morning I started it and the engine was knocking

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Are u using the recommended fuel ? if so try running a couple of cans of fuel injection upper cylinder cleaner through the system with the next few tanks of gas, try LUCAS brand, it is among the best, the next step is to have the engine de-carboned by the dealer, this works very well, you can also remove an octane selection jumper, it retards the timing 2 degrees, that will most times stop the ping.

Posted on Sep 11, 2008

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Posted on Jan 02, 2017

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1 Answer

2001 crown vic leaks oil and makes knocking sound when i accelerate, what can this be and please dont say rod knock


Can be several things. I want to say spark knock. Don't remember if your engine came with a Knock sensor.

Also stretched timing chain or weak timing chain tensioner. Another term to look at is "valve rattle". This would give you closer to a machine gun sound than other things.

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I have a 2000 Ford Vrown Victoria 4.6 liter.Starts and idles fine, engine knock starts when reving or accelerating, performance is unaffected, Any suggestions for a ressolution.


Have you tried premium fuel? If this cures it then its just "ping" or "spark knock". Have you checked the oil recently? Make sure its full. This could be serious but is hard to diagnose with out hearing it. Hope this at least gets you started.

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1999 FORD CROWN VIC. 4.6 - PROBLEM, NOISE


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