Question about 2001 Mitsubishi Montero Sport 4WD

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Shuddering going uphill 2001 mitsubishi montero sport

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  • onelovedao Jul 18, 2009

    Thank you very much for your response. It did turn on the engine light, had the spark plugs and wires replaced, then the engine coil. The light is off but it is still doing the same problem, just not as severe. I have been reading about a transmission torque problem with these cars 2000 and over. It talks about shuddering going up hill or hiway speeds of 50 mph which my car is still currently doing. They are suggesting flushing the transmission and using Mits SPIII ATF only. I will give it a try and post my results.

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Most likely you have a misfire, I'd be surprised if it didnt turn on the check engine light. It may be a coil or sparkplg problem.
Do this this. With your foot on the brake hard and the ebrake on put the car in gear and rev the car up a bit. What your doing is putting a load on the engine to see if it shutters. If it does it points to a coil issue usually or it just may be time plugs and wires

Posted on Jul 18, 2009

  • Ernset ( Skip ) Bouvette

    even tho the light is off their still is a code stored in memory. IIf a good scanner is used to read it it can help point to the cylinder thats being affected. TThere are only two choices now, either you have a coil issue or injector issue. Be aware if this is a misfire get it fixed ASAP because you are now stressing the catalytic converter. It can wear out fast with a misfire then you will get a p0420 code indicating the cat may need to be replaced

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I have a 2001 Montero Sport with 325,000 miles on it. I had recently changed the plugs and wire set. A few months later my vehicle would shutter going uphill at 55 MPH. The engine light would come on. I checked the error code and it indicated the number 6 cylinder had misfired. I suspected the injectors but a bad injector would create the same problem at ,any speed. Once again I pulled the exhaust manifold apart and found my spark plugs where in a pool of oil. I changed the valve cover gasket and got a top grade set of plugs and wires. Now my Montero Sport rips uphill without any problems. Be careful when buying replacement parts as there is is a dramatic difference in quality. A cheap wire set and oil probly caused the spark plug to ground out before the electricity could reach the botom of the plug.

Posted on Jan 02, 2013

  • Sir Drives Alot Jan 14, 2013

    There is one other possibility. I had the same problem and thought I had it fixed by changing the coil, spark plug wire and the plug itself. I also changed the valve cover gasket. The problem manifested itself again. It also ha[p[ened that my break lights had gone out. My third problem was my cruise control would not disengage when I applied the break. I knew that replacing the break light switch located on top of the break peddle arm would cure the problem. I bought a new one for $30,00. When I was up at the counter the guy mentioned that this unit controls the cruise control shutoff and also coordinates the transmission when shifting. I had noticed the transmission was a little off but still worked. After I replced break light on/off switch iy cured all three problems. Now when I travle uphill I no longer have any problem, the cruise shuts off when I apply the break, and my break lights come on.

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