Question about 2002 Mercury Grand Marquis

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Have a 2002 merc marquis seems to be missing when excelerating until about 47mph then it smooths out , plugs , fuel filter ?

Tranny has just been flushed ran good then this started

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They had issues with the intake manifold leaking air, this can cause a miss, but i would start with plugs and wires. don't worry to much on a fuel filter at this point.

Posted on Apr 21, 2015


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Posted on Jan 02, 2017


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Since it could be several different things in the ignition system, as well as fuel and other things, you may have to get professional help.
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Sounds like a clogged fuel pump. It can happen instantly with no warning. The fuel gets low enough to slow the speed of fuel that gets to the motor. making it hard to stay running when under heavier loads. Try replacing the fuel filter. Thanks for asking!

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1 Answer


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