Rough Idle on 2000 Chrysler Cirrus ...

Discussion in 'Cirrus' started by M100C, Jun 14, 2009.

  1. M100C

    M100C Guest

    Here's a puzzler to get your mind off the Chrysler/Fiat deal ...

    I've got a 2000 Chrysler Cirrus with the 2.5L Mitsubishi engine. Car
    is at 98K mi; I've had it since 45K, and it ran like a top, until

    After warm up, and while idling in P or N (when the transmission is
    not engaged), it idles at specification, but has what appears to be
    intermittent misfiring. The misfiring is not rhythmic; it is random.
    The misfiring is spread apart such that I might have 3 - 5 sec. where
    the idle is smooth, then it stumbles and regains. This is repeated,
    and random. Now for the interesting part ...

    If I shift into R or D ... after the transmission engages and "pulls
    tight" ... it idles smooth as silk! As the transmission is engaging,
    the load just briefly pulls the idle down (as witnessed on the tach),
    but the engine compensates, and the idle speed is restored ... then it
    idles smooth. I can shift back and forth from D to N and replicate
    this behavior all day.

    The car is due for plus and wires, but I would have expected the
    condition to worsen at idle under a load. Any thoughts?

    M100C, Jun 14, 2009
  2. M100C

    KirkM Guest

    Had a similar problem with my 2000 Cirrus. It has the 2.4 4Cyl. The
    problem turned out to be the plug wires.

    KirkM, Jun 15, 2009
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