Question about 1999 Ford Crown Victoria
Engine knocks during hard acceleration but not during normal acceleration.
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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