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Reprogram?? I don't know if you can reprogram the idle but there is a idle adjustment screw on my 91 right under the intake.... Try adjusting that
u might need a idle air control value
AnswerThere is no fast idle speed screw on a fuel injected motor. Check the Idle Air Control valve, the Throttle Position Sensor, and the Mass Airflow sensor before you go digging around with the ECM.first 91 has a 5.0 92 has a 4.6 there is a stop screw that can be adjusted but i don not recommend it i would try the above
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What control the cold idle speed on a 1992 mercury grand marquis?
the cold idle is controlled by the PCM ( power train control module) the computer of the car and idle is not adjustable.
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Open the hood of the car and find the idle air control valve. The valve is located on the Gran Marquis' throttle body. The idle air control is a cylinder with a wire connector plugged into it. If needed, refer to your repair manual for an exact diagram. Read more: How to Clean the Idle Air Control Valve in a 2001 Grand Marquis | eHow.com http://www.ehow.com/how_7649344_clean-valve-2001-grand-marquis.html#ixzz1eqCpBmRx
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idle air control motor.
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Idle speed motor defective. Also possible a vacuum leak.
Why would a 1995 Mercury Grand Marquis have high idle?
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Why does a 98mercury grand marquis start then stall but runs when you keep your foot on the gas pedal?
CHECK IDLE CONTROL VALVE, I REPLACED COST 80 DOLLARS ONLY TWO SCREWS,WORKED FOR ME
How do you replace the idle air motor on a 1997 mercury grand marquis and is it something an amateur can do?
Idle air controllers are held on by two screws on one side of the EGR block. Remove the two screws, discard and replace the gasket and reattach. Should take about 10 minutes.
