Question about 1994 Mercury Grand Marquis

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Change spark plugs on 1994 grand marquis - 1994 Mercury Grand Marquis

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  • Mercury Master
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Click here Van to see how to remove your spark plugs.

Posted on Nov 26, 2012

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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: how do u change thr spark plugs

1.Remove engine shroud.
2. Unplug and unbolt ignition coils.
3. Remove coils. Plugs are under coils.

Posted on Aug 23, 2009

  • 5 Answers

SOURCE: 1994 Mercury Grand Marquis Check Engine Light Code 332

its the tube going from the egr valve to your exhaust it have carbon build up and you either have to replace it or get a metal coat hanger and clean it out.

Posted on Sep 26, 2009

  • 1 Answer

SOURCE: own a 1997 mercury grand marquis. went to change

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

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  • 56 Answers

SOURCE: what is the spark plug gap specification for a

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

Posted on Jan 24, 2010

  • 1757 Answers

SOURCE: 2002 mercury grand marquis spark plug wire diagram

For the 4.6L V8:
Firing Order:
1-3-7-2-6-5-4-8
Cylinders:
(back of engine)
4-----------8
3-----------7
2-----------6
1-----------5
(front of engine)

Let me know if this helped...

Posted on Mar 16, 2010

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1 Answer

2001 mercury grand marquis reading code p305 misfire, spark plugs and coils changed


If you changed the #5 Coil then the code was wrong

You get lots of wrong codes on a ford, as a bad coil
spikes the pcm when grounding out to fire the coils
secondary side

Try putting the old coil back & walking the new one to
another cylinder,may take many days & many miles of
driving to get it fix,but better than a shop guessing, because
they hate fords

Jan 24, 2013 | 2001 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

Im going on a road trip to atl from mia, changed oil and filter, rotated tires, brakes seem fine, do i need a tune UP?


Pull a spark plug and see there are reference guides in the back of most haynes manuals and at http://www.aa1car.com/library/reading_spark_plugs.jpg

Mar 07, 2010 | 1994 Mercury Grand Marquis

1 Answer

Changing plugs in '04 grand marquis.


The new system is called a DIS (digital ignition system). Plugs are changed the same as usual, just without the cap and rotor. Instead of a single coil, now the new system has COPs (Coil over plugs) installed, these are recommended to be replaced around 75000miles and they are costly. hopefully this helps

Aug 18, 2009 | 1993 Mercury Grand Marquis

2 Answers

How do u change thr spark plugs


1.Remove engine shroud.
2. Unplug and unbolt ignition coils.
3. Remove coils. Plugs are under coils.

Jul 31, 2009 | 1998 Mercury Grand Marquis

1 Answer

I have a 1994 Mercury Grand Marquis... it pings on accelaration, do I adjust the timing and if so.. how ?


use a higher octane gassoline
sounds like u got a spark knock.
also check the tune up parts

Dec 13, 2008 | 1994 Mercury Grand Marquis

1 Answer

Won't Start


If it cranks but doesn't start, it's a fuel or spark problem. Check the plugs, wires, and fuel filter first.

Dec 08, 2008 | 1994 Mercury Grand Marquis

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