1997 Grand Caravan w/3.8 - stalls at 40mph and below, jerks/stumbles at highway speeds

Discussion in 'General Motoring' started by Scott D. Magee, Apr 6, 2005.

  1. 97 Grand Caravan with 3.8, front wheel drive. This intermittent problem is
    driving me nuts. At speeds around 35mph or so the van will stall. At
    highway speeds, 60, 65 it will buck or stumble or jerk once, but not stall.
    It's like if the transmission disengaged then re-engaged. Also at highway
    speed when it does this the speedo jumps up to around 80mph. And it will
    knock it out of cruise control if it's on.

    There are no trouble codes after this happens. And it does not happen all
    the time. Once a day if that much.

    Any clues?

    Scott D. Magee, Apr 6, 2005
  2. Scott D. Magee

    jdoe Guest

    I'd start with output sensor on trans. Sounds like it's going flaky. You may
    have another issue too, but this is a good start.
    jdoe, Apr 6, 2005
  3. I assume you are talking about the ouput Vehicle Speed Sensor. Does the
    input Vehicle Speed Sensor have any influence on the speedometer?
    Scott D. Magee, Apr 6, 2005
  4. Scott D. Magee

    maxpower Guest

    Could be a missfire, Normally the speed sensors will set a fault and turn
    the lite on, maybe have the dealer/ garage connect the scan tool up and test
    drive it to see what is going on.

    Try spraying the egine with water and test driving it, maybe a plug wire

    Glenn Beasley
    Chrysler Tech
    maxpower, Apr 6, 2005
  5. Scott D. Magee

    Mike Guest

    My 3.3 acts like that when the injectors get dirty, or I have a bad batch of
    fuel. You could try adding some fuel system cleaner/injector cleaner.
    (Remember injector cleaner needs a few trips to work its magic)
    Mike, Apr 6, 2005
  6. Humm, would one cylinder missfire stall the engine? In fact I did have a
    bad plug wire a couple of years ago. It just caused a stumbling on

    The thing that bugs me, on the highway it bucked real hard, the speedo ran
    up around 80+mph, then all was fine. No codes set. I've been driving this
    van for a week now trying to get it to do what it does. So far it's only
    bucked at highway speeds once an stalled pulling into a parking spot once.
    That should give you some idea how intermittent this is. And never any
    codes set. I do have a scan tool, but it only reads generic OBDII codes.

    I'm trying to avoid the dealer at all costs. I know what they will say... I
    need brakes and a new muffler... (which I don't)... LOL

    Something else I'm remembering. It's done this for a while now, again
    intermittent and not so much after a good warmup. It seems that when
    comming off part open throttle and slowing down to a stop, the tranyy does
    not want to downshift. You can feel it bump/jerk when you do finally come
    to a complete stop. As if the lockup torq converter just won't let go or
    something. Would an bad VSS have an influence on this behavior?

    What would happen if the lockup converter let go momentarilly on the
    Scott D. Magee, Apr 7, 2005
  7. Scott D. Magee

    maxpower Guest

    Im with you avoid them at all cost. They may have a better chance at fixing
    it, especially if they have to go inot the CVI's to see what the trans is
    maxpower, Apr 7, 2005
Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.