Question about 1992 Mercury Grand Marquis

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My 92 Mercury Grand Marquis

I recently had my transmission rebuilt due to a rough shift btw 30-40mph. A week later it was happening again so I took it back and they "repaired" it again. A week later its happening again. I noticed that the check engine light was coming on before this rough shift began to occur. Is their anything that could be malfunctioning in the engine that causes more strain on the transmission.

Posted by Mrdonte on


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Yes there could be. You need to get the code checked.

Posted on Aug 20, 2017


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  • 17 Answers

SOURCE: 1994 mercury grand marquis v8-281--4.6l

Ok odds are you just need a routine tune up. Plugs, fuel filter, air filter. Now this engine uses coil packs i think, so you wont have normal plug wires. The coil packs are individual and sit directly on the plugs. So it is possible you have a bad coil pack. These engines were known to have this problem in excess. So try the cheap fixes first. plugs, fuel filter...these two is the best two to try first.. The air filter wont cause a bad miss unless it is completely dobbed up. so just for your own good to change the air filter.Now if neither the plugs or fuel filter fixes this car try this. Each coil pack will have an individual plug on top of them. So listen closely to your engine. Unplug each coil pack one at a time, Now evry time you unhook a plug the engine should miss, so unplug one at a time, and if the engine does miss they are working properly. Now if you unhook one of these and there is no change in the idle of your engine, my friend you have found the problem. All you have to do if you find one that does not change the engine idle, you just go buy a coil pack and replace it. This should fix you right up

Posted on Sep 04, 2008



  • 659 Answers

SOURCE: 2000 Mercury Grand Marquis

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


  • 1392 Answers

SOURCE: 1997 Mercury Grand Marquis check engine light came

If you don't address it, it will be more serious as in burnt valves, burnt up converter, possibly more engine damage. Get it repaired. Probably needs just a tune up, but needs to be checked to be sure.

Posted on Jul 29, 2009


  • 5 Answers

SOURCE: 1994 Mercury Grand Marquis Check Engine Light Code 332

its the tube going from the egr valve to your exhaust it have carbon build up and you either have to replace it or get a metal coat hanger and clean it out.

Posted on Sep 26, 2009


  • 10 Answers

SOURCE: how can i rest my check engine light on my 92 grand marquis. it comes on when i am in motion. There is nothing seriously wrong with the car, I do notice the gas milages as been poor. What could be ca

1 minute won't reset any codes for the Grand Marquis. You need to dicsonnect the ground and wait 15 mins for the caps in the comp to fully discharge.

Posted on Dec 15, 2009

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