97 Intrepid runs rough at times

Discussion in 'General Motoring' started by Gee, May 5, 2006.

  1. Gee

    Gee Guest

    I have a 97 Intrepid that has had a recurring check engine light
    problem that turned into a rough idle and intermittent rough running
    problem. The oxgen sensor has been replaced as well as the intake.
    The problem went away and has now resurfaced. When the engine is cool
    it runs fine. After the day warms up and when I drive home, after 20 -

    30 minutes it starts to lose power, the check engine light blinks and i

    have to ease off and feather the gas to get it back. If i have to slow

    or stop, it is so rough the car feels like it is running on half the
    cylinders, and at times the transmission won't shift properly.

    The fuel pump was replaced about 2 yrs ago.

    It has 5 codes that all are cylinder misfires. P0305,P0301,P0303 etc
    Gee, May 5, 2006
  2. Gee

    maxpower Guest

    If the check engine lite flashes you are experiencing a cylinder misfire,
    when was the last time the vehicle had a tune up with a good set of plug
    maxpower, May 6, 2006
  3. Gee

    Gee Guest

    The last tuneup was about a year to 18 months ago, but the wires and
    plugs were checked in January when it was in the garage for this
    problem. At that time they replaced an oxygen sensor that was bad and
    the intake(plenum) on top of the motor.
    Gee, May 6, 2006
  4. Gee

    Mark Guest

    I have 2 '97 Intrepids with one that runs a little rough at idle and
    continually illuminates the Check Engine Light with a code 43 which is an
    engine misfire code. After changing (swaping out with my other car) the
    plug wires, ignition pack, I was still getting the light coming on.
    Finally my mechanic buddy sprayed something on to the front portion of the
    intake manifold and the idle cleaned right up (temporarily). His
    recommendation is to replace the intake manifold gasket (which I have yet to

    Right now I have another problem with the other Intrpid that I will post
    Mark, May 7, 2006
  5. Gee

    maxpower Guest


    If your other one is the overheating one the intake manifold gasket causing
    the rough idle may also be causing there overheating problem. The water
    jacket on the cylinder head is next to the intake valve and will suck the
    coolant into the engine causing low coolant and eventually an overheat

    Glenn Beasley
    Chrysler Tech
    maxpower, May 7, 2006
  6. Gee

    Gee Guest

    In the morning the car runs fine and I drive for 35-40 miutes about 25
    miles, most of them at highway speeds. In the afternoon once the air
    has warmed up and after driving a few miles(5-8) miles the engine
    starts to misfire and falter, losing power and speed. If l let off the
    throttle and feather it for a few minutes, it smooths out somewhat or
    you can put your foot into it and overpower it with rpms. Could bad
    wires behave this way? It seems to me that it is more like a vaccuum
    problem or some unit that behaves differently when warm than when cold.
    Gee, May 8, 2006
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