Question about Mitsubishi Montero

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The Pajero starts fine and idles normal, but when driving it cannot drive over 30kph or pass over 2000 rpm. When pressing the accelorator lightly it gives spurts of power like something is opening and closing. If you press the accelortor harder it doesnt give anymore power and sometimes stalls.

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  • rmolefhe May 30, 2010

    My Pajero 3.5GDI 2004 starts fine and idles normal, but when driving it cannot drive over 30kph or pass over 2000 rpm. When pressing the accelorator lightly it gives spurts of power like something is opening and closing. If you press the accelortor harder it doesnt give anymore power and sometimes stalls.
    I took for service and it performed very well for the 1st 100km and thereafter it went back to its original problem.

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The symptoms you mention here are classic of either a plugged fuel filter or catalytic converter. Replace the fuel filter, they're cheap and it's really just maintenance. If that doesn't help, remove the oxygen sensor that is between the engine and the catalytic converter in the exhaust system. This will allow pressure to escape if the cat is plugged, drive it, it will be noisy, if performance improves---replace the cat.

Posted on May 30, 2010

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  • Mitsubishi Master
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Hi ime am presuming this is a diesel with a turbo? if so it sounds like the turbo might be at fault, do you get a whistling sound when you accelerate? or nothing? if nothing then you might need to get the turbo looked at, this sounds like the waste gate is sticking so the the compression is not circulating and giving the turbo time to get up to speed, can you confirm engine size and type of fuel please so i can give you a more accurate account of the problem thanks

Posted on May 30, 2010

  • rmolefhe May 30, 2010

    hello steve , this is a petrol pajero 3.5 gdi

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  • Mitsubishi Master
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Keep in mind that the valves get coated in hard carbon, and that causes alot of problems. My first thoughts were a fuel supply problem, maybe in the fuel pump relay? Do you know if there is a continuous 11 volts runnng to the pump?

Also, Spark Plugs and Wires.

Hope this is of some help; tell us news.

Posted on May 30, 2010

  • rmolefhe May 30, 2010

    This pajero has 60000km, can this be possible that the valves could be coated in hard carbon

  • rmolefhe May 30, 2010

    the car went for service last week friday and from the garage it was performing very good but after having done about 100km it went back to its problem

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