Question about Mitsubishi Montero

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2003 4x4 2.5 diesel engine. often wont rev cleanly, feels like it's bogging with too much fuel, light accelerator pressure is ok but lots of accelerator pedal especially in lower gears and it bogs. Is it likely to be dirty injectors?

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  • crevant Dec 02, 2008


  • crevant Dec 02, 2008

    I changed the air and fuel filter. the engine was analysed by Mitsubishi for another low speed judder fault and remapped which cured the other fault but didn't get rid of the one that is still present. I tried a cleaner fuel additive and some excellium diesel, still no joy.

    I am no expert but the symptom is similar to a petrol engine being far too rich which is what made me think it's the injectors.

  • crevant Dec 02, 2008

    The fuel filter looked fine. I think I will get someone (who knows what they are doing) to look at the injectors.

    Thanks for your help it's appreciated :o)

  • Anonymous Mar 19, 2014

    We replaced the egr valve. The catalytic converter is ok.



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My wife had a similar problem with a 2006 Grand Vitara Suzuki. Actually, problem was poor quality diesel. Sha had to add a specific filter forsulfur and it was solved. Maybe this can help. Must precise that my Landcruiser, using the same diesel, didn't show any prolem at all, so some cars are more vulnerable than others

Posted on Dec 30, 2008

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Could be dirty injectors but also change the fuel filter first as this is often the problem

Posted on Dec 02, 2008

  • usersteve83 Dec 02, 2008

    I agree the injectors would be my next step,, what was the fuel filter like, if it was rotten then it will have muck in the injectors too, after that would be the fuel pump



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