Question about 2000 Mercury Grand Marquis

1 Answer

2000 Mercury Grand Marquis

The engine starts to skip at 40mph? Had a diagnostic test done, found one spark plug that neede replacing, but problem return that?

Posted by on

  • 3 more comments 
  • revdeb95 Dec 19, 2008

    Yes, the new spark plug change how it ran for a while? And the same problem returned a few days later.

  • revdeb95 Dec 19, 2008

    I also forgot to mention that the spark plug had moisture on it?

  • revdeb95 Dec 19, 2008

    motor1258, I responded by saying, that when the spark plug was changed my car ran well for a while, but then the same problem returned a few days later? i also forgot to mention that the spark plug had some moiture on it?

  • Mike Butler
    Mike Butler May 11, 2010

    Moisture as in oil, or unburned fuel? Did he not change plug wire also?

  • Mike Butler
    Mike Butler May 11, 2010

    Did the new spark plug change how it ran for a while at least? Was old plug just carbon fouled or did it have signs of oil on it?

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 659 Answers

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.

Posted on Dec 21, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

Misfire on mercury grand marquis p305


I answered this already

If a MIL Lamp is flashing please do not use the car

That on a ford that is called a Class A Cylinder misfire & will
destroy your exhaust converter, as well as possible other
engine damage,work on the misfire issues

Jan 24, 2013 | 2001 Mercury Grand Marquis

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

1 Answer

Show engine spark plug cylinders on 2000 mercury grand marquis 4.6l


Firing order 1-3-7-2-6-5-4-8 Cylinder locations: Passenger side starting at front of engine and going to the rear: 1-2-3-4 Driver side front to rear: 5-6-7-8 This actually for a 1996 model, but I should imagine it is the same.

May 20, 2012 | 2003 Mercury Grand Marquis

1 Answer

What do spark plug wires for a grand marquis 2000 look like?


This engine does not have wires. It has what is known as COP coil over plug. Each spark plug has its own ignition coil mounted on top of it. The boot portion is replaceable if needed. one small bolt should hold each one down and has a small connector on each.

Jul 31, 2011 | 2000 Mercury Grand Marquis

1 Answer

The engine misfires when accelerating


Depending on your Grand Marquis's mileage...it sounds like plug wires and plugs...(worn out) and or engine timing/firing order? If plug wires recently changed...the spark plug wires are in the wrong firing order...confirm the firing order from your local parts store by phone...and retrace each one...always start with #1 cylinder...hope this helps.

Apr 25, 2011 | 2000 Mercury Grand Marquis

1 Answer

Oil leak found in one out eight spark plugs we changed on a 2000 mercury grand marquis


If oil was found on outside of plug oil may be leaking from valve cover gasket and it should be replaced

Jan 07, 2011 | 2000 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

2006 grand marquis


Generally check engine light problems have to be checked with a diagnostic tool. Under the dash would be a rectangular shaped plug with about 8 prongs, not sure exactly. That's normally where you would plug in the diagnostic tool.

Sep 23, 2008 | 2006 Mercury Grand Marquis

Not finding what you are looking for?
2000 Mercury Grand Marquis Logo

Related Topics:

254 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mercury Experts

yadayada
yadayada

Level 3 Expert

61037 Answers

Fordexpert

Level 3 Expert

5331 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Are you a Mercury Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...