Question about 1998 Mercury Grand Marquis

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Where is the 5th spark plug or 5th coil is located on a 1998 grand marquis?

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Here is a photo to help guide you. hope this helpswhere is the 5th spark - onetufshoppe_132.gif

Posted on Mar 23, 2011

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1 Answer

What are coil on plugs on the 1998 mercury marquis


Ignition coils over spark plugs for each cylinder

They have been on most fords for over 15 years
nothing new there

They are most all vehicles now


Google the question & read up

Feb 15, 2013 | 1998 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.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

May 16, 2011 | 2002 Mercury Grand Marquis

1 Answer

Where are the spark plugs located in a 2003 grand marquis


They are located on top of the heads next to the intake. Each cylinder has a Coil on it held down with a 7mm bolt

Apr 26, 2011 | 2003 Mercury Grand Marquis

1 Answer

I want to replace coil pack on my 1998 mercury grand marquis. How do i begin


Removal & Installation To Remove:
  1. Remove the air cleaner outlet pipe if interfering.
  2. Disconnect the connector from the ignition coil. coilconn.gif

  3. Remove the bolt from the ignition coil. coilbolt.gif

  4. Remove the ignition coil on plug.
To Install:
  1. Install ignition coil on spark plug.
  2. Install ignition coil bolt. Tighten to 10 Nm (89 in. lbs.). coilbolt.gif

  3. Reconnect the ignition coil electrical connector. coilbolt.gif

  4. Install the air cleaner outlet pipe if removed earlier.
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Jul 06, 2010 | 1999 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

1998 Mercury Grand Marquis GS runs Rough when cold


I have the same problem and can
Not figure it out did u have any luck?

Feb 02, 2010 | 1998 Mercury Mystique

1 Answer

Location of spark plugs 2000 grand marquis


the plugs are down inside the valve covers under the ignition coils, there is one coil fo each spark plug

Oct 14, 2009 | 2000 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

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