Question about Lincoln Town Car

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My 88 Linoln towncar stays on high idle and will intermittently go back to regular idle speed and then back to high idle, while driving and warmed up

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Sounds like your idle air control (IAC) valve is bad.

Posted on Feb 03, 2009


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1 Answer

What can I do about high idle when engine is warm?

Is your air condition on? This will increase engine speed.
is your truck's cooling system working properly? This may increase engine speed.
is air filter clogged? Truck needs less cool dense air than warm air
good luck

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I have a 96 Towncar, which had a P0125 trouble code set. I changed the thermostat and cleared the code - only to have it reset in a couple minutes after starting. The car was hard starting, and died several times before it actually ran. I did also noticed that while running the idle speed had risen to over 950 RPM.

I changed the Temperature sending unit located next to the thermostat housing, and again cleared the code. After starting the car again it performed excellently and did not reset the P0125 trouble code.

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So you are saying for the most part that it won't idle until it gets warm? Sounds like the idle speed control motor is bad.

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