20 Most Recent 1986 Mercury Grand Marquis Questions & Answers

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When I try to start

Is it just clicking, like the battery is dead? Will it turn over fast, with the spark plugs removed? I would try using jumper cables, and try giving the starter a better ground -. Clamp to starter housing and negative side of battery. (NOT + TERMINAL) . If these make no difference, I would buy a NEW starter.
9/7/2017 1:33:25 PM • 1986 Mercury... • Answered on Sep 07, 2017
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I have a 86 grand Marquis ,I am not getting power to anything, lights, anything. New battery. New cables.. Any ideas?

Check fuses, grounds and /or follow the positive cable until you find where it's disconnected
11/28/2016 10:12:53 PM • 1986 Mercury... • Answered on Nov 28, 2016
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How do I install a new parking break cable and handle

The ratchet is just bolted to the car with 3-4 bolts. Then go under the car and remove the adjuster nuts at the "U" divider bar. All large American cars use the same system for the park brake, so please watch the video, I know this job and the video will show all you need to know, you will need to raise the car off the ground. How To Install Replace Emergency Brake Cable 1AAuto com
9/7/2016 9:42:43 PM • 1986 Mercury... • Answered on Sep 07, 2016
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Disarming alarm

If it does not share a circuit with another accessory...pull the fuse.
8/16/2015 3:36:46 PM • 1986 Mercury... • Answered on Aug 16, 2015
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Installing sterio

Buy an installation kit to ensure proper connections... Also, don't buy a DUAL deck...junk
1/17/2015 1:45:31 AM • 1986 Mercury... • Answered on Jan 17, 2015
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What is the heater hose routing on an 86 mercury grand marquis 5.0

Look at the fire wall you will see two hoses going through the wall they are 3/4 inch they will be your heater hoses one routes out the back of the intake manifold I believe the other is by the ECM valve. Are you missing your heater hoses if so it may be that you have a bad heater core have you owned this car for long. If you are needing to reinstall all your hoses look on You Tube you will probably find a video telling you how to do it.
1/9/2015 5:22:23 PM • 1986 Mercury... • Answered on Jan 09, 2015
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Download manuals for free

Being in the service then you will know where to search the web to get free downloads for what you want
7/19/2014 5:46:41 AM • 1986 Mercury... • Answered on Jul 19, 2014
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Have fire going to ignition coil but will not come out into distributer

There is no fire involved, except in the engine cylinders is there! Use the internet Google-- how to test your specific ford motors ignition system There is lots there to help you,IF you have the skills needed to use a volt meter
7/16/2014 2:02:11 AM • 1986 Mercury... • Answered on Jul 16, 2014
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Idle surges up and down but does not stall

Idle speed control motor could be causing this or a vacuum leak.
2/11/2014 10:37:22 PM • 1986 Mercury... • Answered on Feb 11, 2014
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Itidle surges up and but does not stall

The idle air bypass valve or the throttle plate could be gummed up and in need of cleaning.
1/24/2014 12:31:06 AM • 1986 Mercury... • Answered on Jan 24, 2014
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1986 mercury marquis 302 distributor burns out

Make sure your audio and video connections are in proper ports and cable is properly connected.
8/17/2013 6:40:20 AM • 1986 Mercury... • Answered on Aug 17, 2013
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Black smoke when start up then clears when driveing

this happens on older motors when the valve seals go bad .go to local auto parts store and get some oil additice that stops smoke this should solve youre problem
3/21/2013 9:34:45 PM • 1986 Mercury... • Answered on Mar 21, 2013
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Shutting off

maybe your fuel pump relay is going bad
11/20/2012 6:09:43 PM • 1986 Mercury... • Answered on Nov 20, 2012
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What could make my 1986 Grand Marquis start hard,run very rough?

gas is only good for 30-60 days drain the old fuel out and put in fresh gas
10/1/2012 1:35:13 AM • 1986 Mercury... • Answered on Oct 01, 2012
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Headlight switch wiring

What problem on the headlight switch wiring???______________________________We do not need magic to transform our world. We carry all of the power we need inside ourselves already.
6/13/2012 9:26:40 AM • 1986 Mercury... • Answered on Jun 13, 2012
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86 grand marquis am not getting power

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