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Need to replace spark plugs 2008 mercury grand marquis

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6ya6ya
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Posted on Jan 02, 2017

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  • 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

Testimonial: "thanks, that's just what i needed to know "

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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

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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

  • 58 Answers

SOURCE: where are the spark plugs located on a 2000 Mercury Grand Marquis

There are eight COPs (coil-on-plugs) to remove. Using a 7mm or 9/32" socket, remove each bolt securing each COP to the intake manifold on top of the engine. Remove all eight COPs, and the spark plugs are underneath. When replacing the spark plugs, use only the proper Ford/Motorcraft plugs, even if they cost twice as much as the aftermarket ones. You will avoid further headaches this way. Hope this helps.

Posted on Mar 30, 2010

  • 564 Answers

SOURCE: how to replace starter +1993 Mercury Grand Marquis

disconnect battery,,jack car up,,put jack stand on frame,,take starter bolts out,(may not be easy),,take wires off starter,,hoped it helped,,

Posted on May 08, 2010

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1 Answer

Mercury grand marquis wont stay cranked


Someone will need to check for spark to the plugs and fuel pressure when it fails to start. Could be a relay or several other components.

Oct 08, 2012 | 2000 Mercury Grand Marquis

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
Emission Label

Any spark plug manufactures web site, has it next to
the plugs avail to fit your engine code

May 24, 2012 | 1990 Mercury Grand Marquis

1 Answer

Can you replace a spark plug on a 1999 Mercury Grand Marquis without pulling the AC


yes you can. the spark plugs are located on top of the motor under the fuel rails. it has coil packs on each cylinders. you need to unbolt the coil turn it then pull it out. its a tight fit but can be done. For more room you can puul the fuel rails. but can be done with. good luck

Oct 03, 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

2 Answers

Where are the spark plugs located on a 2000 Mercury grand Marquis?


There are eight COPs (coil-on-plugs) to remove. Using a 7mm or 9/32" socket, remove each bolt securing each COP to the intake manifold on top of the engine. Remove all eight COPs, and the spark plugs are underneath. When replacing the spark plugs, use only the proper Ford/Motorcraft plugs, even if they cost twice as much as the aftermarket ones. You will avoid further headaches this way. Hope this helps.

Mar 30, 2010 | 2000 Mercury Grand Marquis

1 Answer

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.

Jun 15, 2009 | 1995 Mercury Grand Marquis

1 Answer

2000 Mercury Grand Marquis


if the moisture was on the outside of the plug most likely water got into the hole. this causes high stress on the coil and causes them to break down. If the plug was replaced and the symptom returned
i would replace the coil.

Dec 19, 2008 | 2000 Mercury Grand Marquis

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