Question about 2001 Mercury Grand Marquis

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I sprayed water under hood now car jerks - 2001 Mercury Grand Marquis

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The 4.6 lit motors have individual coil packs. usually, they are not very suceptable to water but... If the check engen light comes on (amber light on the dash) It's probly just skipping. Get some one to put the car in drive and hold the brake. Under load the skip will be worse. Unplug each coil one by one. As they are unpluged,the motor will shake worse. when you unplug one and the skip dosn't get worse, you have found the bad cylender. Odds are it's a coil pack but replace the plug too.

Posted on May 12, 2009

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Posted on Jan 02, 2017

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