Question about 1999 Jeep Grand Cherokee

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Hitch in engine

Intermittantly, when I take my foot off the gas, there is a slight hitch in the engine. This happens mostly when I am going slower - under 30. I haven't noticed this at faster speeds. Any idea what is causing it?

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  • cjp12711 May 30, 2009

    this is a V8

  • cjp12711 May 30, 2009

    It's also an Automatic, AWD...

  • cjp12711 May 30, 2009

    is this at high rpm? - No - it's typically when I'm at a lower speed, accellerating slowly, or just maintaining my speed.

    do you notice a gear change? I think it's happening after the change out of first gear.

    this might be related to TCC lock up malfuntion/
    when dose it happen ? all the time, in 3rd gear ? when on cruse control? up/down all speeds ? It seems to happen intermittantly - no pattern yet, although it's always when I'm under 30 mph, and in 2nd gear and then take my foot off the gas.

    are any lights on ? - No - no indicator lights or warnings are on.

  • Ryan
    Ryan May 11, 2010

    is this at high rpm?

    do you notice a gear change?

    this might be related to TCC lock up malfuntion/

    when dose it happen ? all the time, in 3rd gear ? when on cruse control? up/down all speeds ?

    are any lights on ?

  • Ryan
    Ryan May 11, 2010

    what type of trany do you have ?



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If the "hitch" is minor, likely it's due to a sticking control valve somewhere...You could try some injector cleaner or manually clean the throttle body and see if it makes any difference. Could also be a small dead spot in the throttle position sensor. When problems are small, they often don't set codes because the fault does not meet the computers requirements to set one. Most larger parts stores will do free code testing though and you may want to have a scan done just to see if anything shows up. Problem could also be caused by a delay in downshift of transmission in which case a fluid change may help. This is where an experienced tech becomes most valuable...just test driving, the problem usually can be isolated to engine or transmission...No one here can feel the problem, only read about it, so the best suggestions may indeed be correct but not correct for your problem.
good luck

Posted on May 30, 2009


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