Question about 1995 Mercury Grand Marquis

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Spark plug gap

What is the correct gapping for 1995 mercury grand marquis ?

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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

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2 Answers

What is the gap for the spark plugs on a 1990 Mercury Grand Marquis?


That should be under the hood on the Federal
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Any spark plug manufactures web site, has it next to
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Spark plug gap setting for a 1998 mercury grand marqius


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1 Answer

1999 grand marqui, 4.6 lit. engin. what is the spark plug gap and torque.


Make: MERCURY
Model: GRAND MARQUIS
Year: 1999
Engine: V8 - 4.6L - FI - - GAS

Part Number: RS12YC
GAP : .054" (Original Equipment Manufacturer and/or Original Equipment Equivalent)

Hope this helps.

Oct 02, 2011 | 1999 Mercury Grand Marquis

1 Answer

I got code PO 305 on a 2002 Mercury Grand Marquis, what is the spark plug wire part called, is it #5 coil, and should I replace the coil and spark plug and what should the spark plug be gapped at? Thank...


I got code PO 305 on a 2002 Mercury Grand Marquis, what is the spark plug wire part called
This will have a direct coil over ignition with a coil over each spark plug. The coil is the electrical part over the spark plug. The coil also has a rubber part that is called the boot or spark plug boot. The boots can be purchased separately but the coils will come with new boots.

is it #5 coil,

Have you checked to see if there is any spark coming out of the number 5 coil?



and should I replace the coil and spark plug and what should the spark plug be gapped at?

When was the last time the spark plugs where changed? It may be due for all the spark plugs to be changed. The spark plug gap is usually listed on the emissions sticker under the hood. It should be .050 - .056 or very close to that.

May 16, 2011 | 2002 Mercury Grand Marquis

1 Answer

Sparkplug gap for 1992 Grand Marquis?


The recommended spark plug gap is .054.

May 01, 2010 | 1992 Mercury Grand Marquis

1 Answer

What are the gap specs for a 2002 Mercury Grand Marquis?


for what the spark plugs? if so the gap is .054"

Mar 04, 2010 | 2002 Mercury Grand Marquis

1 Answer

What is the spark plug gap specification for a 1992 mercury grand marquis?


go to or call an auto pARTS STORE they can tell you the plug gap.

Jan 24, 2010 | 1992 Mercury Grand Marquis

1 Answer

What are the igniton timing,firing order, spark plug gap specifications for 1998 Merc Grand Marquis with 400 cdl engine?


1998 Mercury Grand Marquis
4.6 liter V-8 VIN "W"

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I will get you the rest of the info in just a few hours...I am at work!

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2 Answers

Would like to know the gap for spark plug gaps for '92 Murcury/Grand Marquis LS..?


Think it is 0.54 but not positive. It should be listed in the back of your owners manual.

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