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    tableclocks's Avatar
    tableclocks Posts: 432, Reputation: 2
    Full Member
    		  
    #1

    Dec 12, 2012, 02:08 PM
    2003 grand marquis rough idle
    2003 grand marquis 52,000 miles... just now developed a small rough idle
    No ck engine lite comes on... standard small v-8.. help please? Richard
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Dec 12, 2012, 02:16 PM
    . Install new Motorcraft platinum spark plugs.

    . Clean the throttle plate and throttle body.

    . Clean the Idle Air Control Valve (IACV).

    . Replace air filter and clean air box.

    If the problem persists, focus on the MAF Sensor.
    tableclocks's Avatar
    tableclocks Posts: 432, Reputation: 2
    Full Member
    		  
    #3

    Dec 12, 2012, 04:09 PM
    Quote Originally Posted by TxGreaseMonkey View Post
    . Install new Motorcraft platinum spark plugs.

    . Clean the throttle plate and throttle body.

    . Clean the Idle Air Control Valve (IACV).

    . Replace air filter and clean air box.

    If the problem persists, focus on the MAF Sensor.
    Thank you v much
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