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How to change a spark plug in a 1999 mercury mystique

My tip is how to change spark plugs in a 1999 Mercury Mystique

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99 mercury mystique icm location 4cyl.

The ignition control module on your car is located right on top of the engine. Follow your spark plug wires up to where they all plug in to a small black box often referred to as the ignition coil. Thats it. The ignition control module is integrated into the coil on this car. Hope this helped.

Aug 15, 2012 | 1999 Mercury Mystique

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how to change the spark plugs on a V6 Mystique

The procedure to replace spark plug on 1999 mercury v6 mystique is as follows:--
There are 3 things that get in the way of the plugs -
  • The plastic cover piece on the front - three 7 or 8mm bolts to remove ..
  • The box underneath that cover - 4 8mm bolts .
  • The coil-pack - this one can be left in place, but for the effort to remove the 4 7mm bolts, it was well worth in my book. Having it loose also made it a bit easier to replace the plug wires 


    use a 3/4" plug socket on a 6" extension
    put a piece of duct tape around the socket extension / socket joint to keep them together.
    Use silicone / Di-electric grease on the plugs and both ends of the wires. 
    A bit of anti-seize on the plug threads won't hurt either
    Don't over-torque the plugs - don't remember exactly what the torque specification is, but it's lower than I would have thought - snug them in tight, but don't "crank" them down hard . 
    Do the plugs one-at-a-time! Helps prevent getting the firing order messed up.
    Plug gap: .054.
Thanks. keep updated for any more query.you can rate this solution and show your appreciation.

Jun 11, 2010 | 1999 Mercury Mystique

2 Answers

changed plugs and wires now it has no power and

You didn't post your engine size so please pick the applicable motor:


Firing order and spark plug wire installation for the 2.5L engine


Firing order and spark plug wire installation for the 2.0L engine

Jan 10, 2010 | 1999 Mercury Mystique

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