Question about 2006 Mitsubishi Raider

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My 2006 Raider V6 becomes sluggish and periodically stumbles in highest gear (automatic) between 1400-2200 rpms when I push the gas pedal. It shows no codes, warning lights or other symptoms. It's been back to the dealer several times; test driven with the service manager and tech who both observed the problem, yet no fix to date. Has new plugs; replaced #2 coil; filters all new; etc. Still under warranty and not getting any happier about this persistent problem! Thanks Matt

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  • lawtonmp Aug 21, 2010

    Hey eyecue - thanks for your solution to my '06 Raider sluggishness.

    So - why doesn't the dealer know this? Or are they sliding on me because it's warranty work for 0$.....

  • lawtonmp Aug 21, 2010

    Seems to make sense to me. Wonder why the dealer doesn't know this stuff; will run it by them next week.
    Hope it works; I like the truck!
    Thanks to eyecue!

  • lawtonmp Aug 21, 2010

    Good morning. Thanks for the additional insight.
    My issue is between 1400-2200 rpm, which is the range where most of my city/highway driving occurs.
    Perhaps the dealer/tech is inexperienced/never saw this before? The tech doesn't sound like it, but again, perhaps they're all sliding on me because it's a persistent warranty issue. I thought the test drives with the service manager and tech, who both felt the problem, would have given them more clues.
    One more fact - the engine at idle seems a little rough to me.
    I'll get on them early next week with your suggestions.

  • lawtonmp Aug 23, 2010

    Hi eyecue. A little more info. on my '06 Raider engine stumbling problem.
    The dealer service manager tells me today that a code should show up if the TPS is the problem; he said the Engine Light indicator should come on. It doesn't/hasn't.
    This whole problem showed up after new plugs, filters, differential oil change, and tire balance/rotate/front end alignment. Does any of that give you a clue?
    I'm driving the regional tech service guy around Wed. to get his insight. In the meantime the stumbling occurs in high gear at lower rpms/around 1200-1300 to 2200 now, and this afternoon seemed to stumble in passing gear in the same rpm range.
    Thanks in advance for ANY help you can give me that I can pass on to the service guys Wed.



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The problem is the TPS and in order to locate it you need a VOM that records trends. There is no test drive involved. You unhook the TPS (throttle position sensor) and hook a ohm meter to it. You then get in the vehicle and with it off, you pump the pedal several times and then check the meter. If there is any reading that says infinity the TPS is bad.

Posted on Aug 20, 2010

  • Brad Brown Aug 21, 2010

    I cannot say why the dealer is not considering this. Notice where your foot is and the tach is when most of your driving is done. IT should be in the range that you are having problems in. That is because that is where the pot (tps) sits when you are at speed. It wears a hole in the TPS. When you hit that hole the engine stumbles and goes nuts.



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