Question about Mercury Grand Marquis
ONE AT A TIME! Take one wire off, replace the sparkplug, and replace the plug wire. Make sure that all connections are tight and move to the next one. I usually work from the back to the front. Also when replacing plug wires, they are a certain length. Match one up that is close to the same length. Hope this helps and remeber not to try to do more than one at a time!
Posted on Sep 06, 2010
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Posted on Jan 02, 2017
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