1990 Montero ecm problem

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1990 Montero ecm problem

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Mitsubishi Forums >> Mitsubishi Models >> Mitsubishi Montero & Montero Sport >> 1990 Montero ecm problem

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1990 Montero ecm problem - 4/4/2007 4:22:44 AM

bdmartin

Posts: 2
Joined: 4/3/2007
Status: offline

Hi, I'm new to this forum. I have a 1990 Montero which keeps burning the ecm. I've incuded pics to show what section it burns. Upper right corner, 4 small black rectangles. So far I have tried 2 good fuel control relays, replaced the fuel pump, and successfully completed a wiring harness check list which Mitsubishi printed out for me. Haven't noticed any obvious wiring problems on inspection. This last time it fired right up but started smoking after about 2 to 3 minutes. Any help troubleshooting my problem would be greatly appreciated! This vehicle is history if I don't figure it out soon.

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RE: 1990 Montero ecm problem - 4/4/2007 9:52:06 AM

off roader

Posts: 419
Joined: 10/20/2005
Status: offline

Maybe check your ISC.

(in reply to bdmartin)

Post #: 2

RE: 1990 Montero ecm problem - 4/4/2007 5:11:21 PM

Manybrews

Posts: 765
Joined: 5/23/2003
From: United States
Status: offline

those are the drivers for the idle air control motor, which has already been mentioned in the post above me.
you have a shorted unit, and it must be replaced.

(in reply to off roader)

Post #: 3

RE: 1990 Montero ecm problem - 4/19/2007 3:34:01 AM

bdmartin

Posts: 2
Joined: 4/3/2007
Status: offline

Just wanted to thank off roader and Manybrews for their responses. The Idle Speed Control was indeed the problem. My Montero is now on the road! Gonna have to test the 4WD in the Rocky Mountains real soon. Thanks again!
bdmartin

(in reply to Manybrews)

Post #: 4