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    Velare's Avatar
    Velare Posts: 16, Reputation: 1
    New Member
    		  
    #1

    Feb 22, 2010, 10:14 AM
    Grand Marquis non starter
    Mercury Grand Marquis 1989 V8 5.0 liter.
    This is my second car, with all the snow here I have been using my 4WD for the last six weeks. Yesterday I cleared the remaining snow off the car and drove it a car length along the drive. Today I tried to start the Mercury, it turns over as normal but will not start ? I am wondering if water/snow has seeped into the fuel tank through the fuel cap door ? I had left the snow on the Marquis as I knew I would not need it in the winter. I will try to start the car tonight to see if I can see spark tracking in the engine compartment. I plan to fit a spare spark plug to an ignition lead to make sure there is a spark at the cylinder. Is there anything else I can do in day light.

    thank you in advance
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Feb 22, 2010, 03:51 PM

    Perform tests in the link below:

    https://www.askmehelpdesk.com/cars-t...ml#post2123675

    The problem may be the Ignition Control Module (ICM), AutoZone Part No. F121, $37.99. I recommend replacing this problematic component every 120,000 miles or 10 years, whichever comes first. Run through the tests and keep this in mind. Easy job to replace the ICM.
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