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post #1 of 1 (permalink) Old 03-13-09, 06:34 PM Thread Starter
jsenurquhart's Avatar
Join Date: Mar 2009
Location: Michigan
Age: 28
Posts: 17
1996 Mercury Grand Marquis Backfires

Does anyone know why my grand marquis backfires on acc?
And also my ECM doesn't Give data "Doesn't have Power" / check engine light doesn't work!!! I've changed Computers, TPS, MAF, AND SPARK PLUGS. Runs fine you park at idle

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