1996 Mercury Grand Marquis idle problem


Old 07-26-02, 12:17 PM
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1996 Mercury Grand Marquis idle problem

I have a 1996 Mercury Grand Marquis LS that will not idle. It starts immediately but cuts right out unless I keep my foot on the gas pedal. Would like to have an idea what the problem could be before taking it to the mechanic.

Thank you
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Old 07-26-02, 05:24 PM
Join Date: Dec 2001
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does the check engine light come on while the engine is running?
could be alot of things such as loose hose from maf sensor to throttle body, bad iac motor , large vacum leak, usually at the pcv hose, even the throttle body could be gummed up enough to keep it from idling or a tps sensor reading out of range.
Old 07-27-02, 10:29 AM
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Thumbs up problem corrected

The check engine light did not come on when the engine was running. I believe your suggestion about the throttle body being gummed up was the problem. I took the car to a local garage, the mechanic corrected the problem for $25! Said he found a lot of black residue when he removed the air filter. I have no idea exactly where this was, apparently though was one of the possibilities you indicated. Before he worked on the car I told him of your suggested possibilities!

Thank you for your assistance (probably saved me a considerable expense)

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