Question about 1985 Mercury Grand Marquis

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1985 mercury grand marquis. Starts then stall, usually more then once. Once started motor surges and then may stall again when put in reverse. Motor surge continues as you begin to accelerate and proceed down the road. When stepping on the accelerator, no response for a few seconds, lift foot and press again, might respond. When stopped with foot on brake, motor continues to serge and must keep foot on accelerator and brake at the same time to keep running. Then sometimes, it runs like a top. What do you think? Problem occurs almost everytime you start it and have not tried anything yet to fix it.

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Maps sensor

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Engine starts then dies after 2 to five minutes 85 mercury grand marquis have replaced distributor , ignition module , coil


Since you have replaced some of the ignition parts, have you checked fuel pressure and the fuel pump relay ?
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Starts and stalls and starts after ten min


Could be a relay or the ignition module among other things.
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I have a 96 Mercury Grand Marquis. The car lurches while driving feeling like it will conk out. Usually when going uphill on the highway and trying to accelerate or maintain speed. This does not happen all...


I have a 96 Grand Marquis with a similar problem. Also on the highway it would just conk out on me suddenly, almost felt like I was hitting the brakes, then it would pick up again. Eventually got to the point where it was stalling out on the highway and at red lights. One day it wouldn't start. Mechanic said the fuel filter was clogged solid. It has run well but every once in awhile still stalls out on me. From talking with other Grand Marquis owners and the mechanic the Mass Air Flow sensor may be to blame. He wanted to charge me $400 but I found the part online for about $85.

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Once my 85 grand marquis heats up it runs rough and misses and dies when slowing to a stop, what could some possible problems be?


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