Subject: 2001 mit montero sport high idle
Question:

Anthony,

My car was just tuned up unfortunately the car still idled rough. I found that
there was no vacuum on the throttle body. I removed this and clean the
obstruction away. The idle smoothed out but it idles at @ 1100 rpm. What are
your thoughts to return my idle to normal curd idle of 750 +/- 100 rpm.
Thanks Mark
Answer: Mark,
Most service manuals give the procedure to adjust your idle. Near the throttle body, there is an ignition idle adjustment plug. There is also a Base Idle Setting Screw (BISS) that is typically located on the throttle body itself. With the engine running and at normal operating temp., the idle adjustment plug and the ECU MUST be grounded, you slowly turn the BISS until you've reached the desired idle speed. I also recommend replacing the PCV valve, air filter and fuel filter (if you haven't already) before adjusting the idle.

If you can't find a Montero service manual at your local auto parts store, you'll probably have luck finding the info online.
Good luck!