Question about 1994 Mitsubishi Montero
Low / uneven idle problem can cause by a lot of components.
Dirty air filter
Dirty injectors + o-rings
Vacuum leak at intake manifold and vacuum hose.
Bad Idle Air Control Motor (IAC)
Low compression (170 psi + is OK)
Start cleaning and repair these trouble spots and see is there any improvement.
For more advance DIY'er then you may try this.
Use a can of Berryman carburetor clean to locate the vacuum leak.
SEE SAMPLE PICTURE HERE
This is a 20-30 minutes job.
Vacuum leaks can occur in following locations.
Intake manifold AND/OR vacuum lines.
Intake manifold is not accessible unless the engine head if off.
You can still check the potential leak by spraying some Berryman near the intake manifold.
Listen for rpm increase after you introduce the Berryman (FUEL) at idle.
Do the same starting from the brake booster unit (the round unit) on the drive side fire all.
Carefully listen for increase of RPM right after to spray the Berryman to the potential vacuum spot.
Get a friend to HEAR the ROM increase or monitor for RPM on the tech.
DO NOT AIM the Berryman into any heat source.
PLEASE RATE my answer if it is useful to you.
Posted on Dec 14, 2009
Hi and Welcome to fixya.
Please could you explain what you mean when you say idler not working???
Posted on Jul 27, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 31, 2013 | 1991 GMC Sonoma
Jan 18, 2013 | Cars & Trucks
Dec 20, 2012 | 2002 Chevrolet TrailBlazer
Jun 22, 2011 | Dodge Stratus Cars & Trucks
May 17, 2011 | 1994 Ford Taurus
Jan 08, 2011 | 2003 Saturn VUE
Nov 14, 2010 | 2003 Chevrolet Tahoe
Feb 01, 2010 | 2002 Pontiac Grand Prix
Oct 29, 2009 | 1999 Oldsmobile Cutlass
Mar 23, 2009 | 1999 Ford Contour
104 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: