91 montero low idle

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linux.server@charter.net - 10 Mar 2007 04:16 GMT

when cold and in park it idles at 12-15 hundred RPM and about 800 in
drive, when it warms up it idles at about 1000 rpm in park and about
500rpm in drive, i have cleaned the throttle body... what else should
i try? i just bought it and i love the space and the transmission is
fine, no slipping.. other than the low idle the engine runs like a
dream, no leaks or smoke.

the truck is a 91 montero RS with a 3.0 and a 4 speed auto.

thanks for any and all help.. and the email addy in the header works

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Bob Shuman - 10 Mar 2007 18:52 GMT

Defective coolant temperature sensor or possibly a vacuum leak somewhere?

> when cold and in park it idles at 12-15 hundred RPM and about 800 in
> drive, when it warms up it idles at about 1000 rpm in park and about
[quoted text clipped - 6 lines]
>
> thanks for any and all help.. and the email addy in the header works

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mg - 11 Mar 2007 15:15 GMT

>Defective coolant temperature sensor or possibly a vacuum leak somewhere?
>
[quoted text clipped - 8 lines]
>>
>> thanks for any and all help.. and the email addy in the header works

There is also an Idle Air Control (IAC) on the throttle body. Checking
the IAC would be high on my list of things to check.

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