Question about 1997 Mercury Grand Marquis
You may have the spark plug wires hooked up incorrectly.
Recheck your work.
Also it is always a good idea to take a picture of your spark plug wires where they attach to the coil before removing them.
Posted on Apr 04, 2015
You must take it for a ride about 1 hour its scary but your computer has to adjust then it will pur good luck
Posted on Apr 03, 2015
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Posted on Jan 02, 2017
SOURCE: Spark plug gap
The correct gap is 0.054 Don't for get to buy the anti seize for the plug so it's easier to replace the next time your replace them and if you use Platinum Spark Plugs, your good for 100.000 miles before they need to be changed if your engine is running 100% on emissions. Good luck and hope this helps.
Posted on Jun 15, 2009
What engine? You need to have it scanned for codes. Autozone will do this for free
Posted on Sep 01, 2009
Testimonial: "thanks for your quick response!"
The 4.6 does not have an traditional distributor. This year engine should have two coil packs located on the front of each valve cover. Each coil pack controls four cylinders. Some of the plug wires will cross over the front of the engine in a wire loom on top of the alternator. The spark plugs are located down in the intake manafold. they run beside the fuel rail on each side of the intake manafold where it joins to each head. You will need an extention at least 8 to 10 inches long to get at the spark plugs. The plug wire fit snuggly into the intake manafold and have an extention on them that connects to the spark plug.
Posted on Jan 22, 2010
Testimonial: "thanks, that's just what i needed to know "
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