Question about 2002 Mitsubishi Montero Sport
Have a scan done at autozone or O'reilleys to get the diagnostic trouble codes read, and go from there. Anytime the light comes on when running, the computer has set a trouble code. It will direct you to the problem.
Have the fuel pressure tested to see if it is the fuel pump. If fuel pressure is correct, it may be your catalytic converter. But get the codes first-they should point you in the right direction.
Posted on Apr 25, 2013
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Posted on Jan 02, 2017
hi there. the reason that the engine idles good when the air-con is engaged is that ussually all vehicles nowadays have a vacumm advance mechanism. this is triggered mainly by a electric solenoid valve which is also attached parallel to the source supplying power to compressor. a small vacumm hose with a diameter like a common pencil or ballpen case. its made of rubber and it runs from the alternator vacumm pump then to the solenoid valve and to the vacumm advancer unit attached to the injection pump throttle. this system raises the idle a tad higher.
if your montero runs completely normal and you experience no other problems with your engine except for your present problem, then the solution is just raising the idle a little higher. if your montero is equiped with a RPM guage on the dash, try adjusting the idle to around 800 rpms. it would be healthier for your car if the idle raises a bit when you engage the air-con because this would compensate for the added load on your engine.
hope this helps.
Posted on May 31, 2009
Check the 'U' joints in the drive line. Check the engine/transmission mounts for damage or looseness. The real enigma is trying to determine if this is an engine or a chassis problem. If the check engine light is on, doing a scan of the computer should show engine problems. If no light, concentrate on anything in the chassis for periodic binding. Good luck!
Posted on Mar 15, 2010
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