Question about 1992 Mercury Grand Marquis

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Backfiring under the hood while I'm driving on my 1992 mercury

While driving my 1992 mercury grand marquis, I can hear backfiring under my hood. What can that be? I put my foot into it and it'll stop, but after I let off of it, it will start back.

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Sparkplugs

Posted on May 26, 2009

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1997 Mercury Grand Marquis is backfiring alot. Why? What do I need to do to fix it? Is it bad to drive my car in this condition?


If it is backfiring, you will cause major and expensive problems by driving it.You should get a good tune up done, replacing plugs, air filter, change oil, new plug wires, and do all of this if it is determined that you still have good compression in all cylinders-a tune up will be pointless if there is a major internal problem, but if you still have good compression, so do not waste time, get this done. At the very least, you may still end up replacing the catalytic converter, not cheap.

Jan 07, 2011 | 1997 Mercury Grand Marquis

1 Answer

94 grand marquis 4.6 where is big 100 amp fuse for altanator


You check in the HIGH FUSE BOX (under hood, near battery)?

Also I suggest check your Grand Marquis Owners Manual (page 274 and next).


ad9c9fe.jpg

Fig. 11: 1989-91 Charging chassis schematic



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FIG : 12: 1992-97 Charging chassis schematic

Hope this help (remember comment and rated).

Apr 08, 2010 | Mercury Marquis Cars & Trucks

1 Answer

94 grand marquis where is big 100 amp fuse for aly.


You check in the HIGH FUSE BOX (under hood, near battery)?

I suggest also Grand Marquis Owners Manual (page 274 and next).


ad9c9fe.jpg

Fig. Fig. 11: 1989-91 Charging chassis schematic



8ad86d6.jpg

FIG : Fig. 12: 1992-97 Charging chassis schematic

Hope this help (remember comment and rated).

Apr 08, 2010 | 1994 Mercury Grand Marquis

1 Answer

Jerking on normal acceleration.


You might try a TPS switch. It should set a code but yours did't. The throttle position sensor sets the spark advance and fuel flow to match. The other possibility is the EGR system which also should set a code.
If you have not changed the fuel filter,try that because if you accellerate hard the fuel slooshes to the back of the tank.
In normal driving the contaminents lay on the bottom of the tank.

Aug 12, 2009 | 1992 Mercury Grand Marquis

2 Answers

Diagram of how serpentine belt goes. Last belt had one on pkg.


for the most part there is a diagram under your hood showing you how the new belt goes on try this website to see if they have your car listed its www.autozone.com you can also ask the part store where you buy the new belt from for a diagram

May 02, 2009 | 1992 Mercury Grand Marquis

1 Answer

Emergency fuel shut off switch for 1992 mercury grand marquis


It is in the trunk I can remember which side on a 92 but it will be behind the side trim panel almost straight down from the trunk hindge.

Feb 21, 2009 | 1992 Mercury Grand Marquis

1 Answer

Car cant rev up,til it's warm


Clean the MAF sensor with electrical cleaner then blow dry with light shop air or just let air dry.then disconnect battery for about 30 minutes to reset keep alive memory.Should take care of your problem.

Feb 09, 2009 | 1995 Mercury Grand Marquis

1 Answer

Head gasket job


wow .. nice mechanic ...

Dec 17, 2008 | 1992 Mercury Grand Marquis

1 Answer

1989 mercury Grand Marquis fuel system


The fuel pump relay is under the hood in the MAXI fuse box, it is a black box with a huge wiring bundle comming out of it.

Aug 19, 2008 | 1992 Mercury Grand Marquis

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