Question about 1990 Mitsubishi Montero

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My 1990 mitsubishi montero 4X4 3.0 will not start weak spark and low compression in all 6 cyclinders HELL please

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At the age of the vehicle, the problem could be most anything. If it is like some of the chevrolets of that time frame. you should first check the coil, then the ignition module. Low compression could mean a blown head gasket, but for all cyclinders, I would guess an overhaul would be necessary, combined with the other problems, unless the car has a special meaning for you, i would replace the vehicle.

Posted on Nov 30, 2014


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I have 150 to 160 psi on 3 cyclinder and 110 to 120 on 1 cyclinder what does that mean

Remove spark plugs from low cylinder put a small amount of engine oil in the cylinder replace plug and do another compression test if the pressure. Increases its probably a worn bore or piston rings if the reading does not rise then it's probably head gasket or a valve not seating properly

Jan 26, 2013 | 1997 Mitsubishi Mirage

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I have a 1992 mitsubishi montero. Spark is weak but there. Will not start even using starting fluid. No fire at all.

my thoughts are ignitor (coil) going out or grounding out, V-6 may have multiple ignitors and if one goes the rest can't compensate. Dealt with this on a Diamante my mother owned some time ago...

Oct 01, 2010 | 1992 Mitsubishi Montero

1 Answer

My 1990 montero will tun over but will not start. i

check for spark and gas by trying to spray starting fluid into the intake and trying to start it. If it starts and runs for a few seconds, then it's a bad fuel delivery system or possible fuel pump.

Sep 18, 2010 | 1990 Mitsubishi Montero

1 Answer

2001 montero sport turns over but wont start.


Aug 21, 2010 | 2001 Mitsubishi Montero

1 Answer

My 1990 Mitsubishi Montero Sport will crank but will not start. I tried to use starting fluid through the air filter shaft but the car still won't start. The car has been stalling before when I am idle and...

Given the year of the Montero I expect the ECU has failed or the component within the distributor which tells the ECU when to send a spark. Check for spark or fuel injector pulse. To check fuel injector pulse rent NOID lights from auto parts store. If no pulse I expect the Distributor if no fuel I expect the ECU
Best regards,

Aug 20, 2010 | 1990 Mitsubishi Montero

1 Answer

1989 Mistubishi Montero with rebuilt engine won't start.

You'll lneed to test for 3 things:
Spark at the plug
Fuel, making it to the cyliinder
Compression, above the minimum spec.

Sometimes when engines have been rebuilt, they have really poor compression as they try to start for a few minutes of cranking. If you have good oil pressure, check compression, if low add a tablespoon of oil to each cylinder to build compression, as soon as it starts it will begin to seat and seal itself, as well as provide ample lubrication.

For Fuel and Spark, just normal diagnostics, based upon your description, I won't mention doublechecking now that it has been cranked a bit.

WD40 can be sprayed into the intake while cranking to get one lubed a bit and to start to idle, it will stall when you stop spraying, indicating a shortage of fuel.

good luck

Feb 23, 2010 | 1989 Mitsubishi Montero

1 Answer

1990 Mitsubishi Montero... Will not turn over


No worries. I think you may be finding it difficult to explain whats happening without being familiar with the terminology. That can be frustrating for both of us.

For example:
  • Turning over - the spinning of the engine by the starter prior to the engine actually starting. Not turning over implies a bad starter or dead battery.
  • Getting Spark - each plug is firing at the proper time, implies the ignition system,which includes the coil, distributor, cap, rotor, plugs and wires are working.
I don't think thats what you were trying to say though. So lets try again.

Why don't you put it in your own words? I can help a bit with a few questions.

  1. What happens when you turn the key? Does the engine turn over? Make a clicking sound? Just sit there doing nothing?
  2. If the engine turns over, is it strongly? weakly?
  3. Does the engine seem like its trying to start? Or just spin?
  4. What prompted the spark comment? Did someone check? Describe.
  5. Can you smell gas? Is there gas in it?
  6. Has any other event, no matter how seemingly unrelated occurred to the vehicle lately?
  7. If the spark plugs are new, who replaced them? A pro?
  8. While trying to start it, does it backfire?
Please comment back or repost with answers to these questions

Believe me, with one exception, we are able to understand what you are trying to tell us. That exception is when you use terminology that means one thing to describe another thing. It throws us off.


Oct 14, 2009 | 1990 Mitsubishi Montero

2 Answers

1995 montero 3.0 no spark on coil #3

check the jack pins condition, check for brakes, check the harnhes for broken wires, try an other ecm from a junked or salvage or borrowed and see if it makes any difference

Jun 23, 2009 | 1995 Mitsubishi Montero

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