Crank Case Sensor and rare stalling

Discussion in 'General Motoring' started by Treeline, Mar 27, 2005.

  1. Treeline

    Treeline Guest

    1994 Voyager 3.0 liter Mitubishi
    Getting near 200,000 miles.

    As D. Stern responded a while ago, very sensitive
    to the crankcase ventillation system. The entire
    PCV system was supposedly checked and
    Chrysler parts put in, even without asking me.
    My independent mechanic decided to do a
    tune-up that even the dealer would not have dared
    and charged more than the dealer which made
    me feel quite stupid. But okay. At least he did the
    PCV valve although I had asked him to do the same
    thing way before.

    Car did run better though. Hoses were checked.
    Don't know if the throttle body was cleaned,
    doubt it.

    Now I noticed it's still doing this rare but obvious
    misbehavior. Sometimes at 600 miles. Sometimes
    at 1000 miles.

    Before, it was when the car was cold and had gone
    a few miles. Now I went about 100 miles and the
    engine was hot and then it just, while going at
    slow speed, stalled out repeatedly.

    I did not check for a code though. I was a little panicky
    so pulled into a gas station to do my usual trick which is
    pour about half a quart of oil into the engine. For some
    reason, this always works. And I am going for another
    600 miles or 1000 miles. It's so strange since I don't know
    if it's a coincidence or there is some indirect connection.
    It would help to accurately know the quantity of oil.

    I find it hard to get a good reading on the oil.
    I would not be surprised if it's all a coincidence and
    I am actually not low on oil. Hard to read the dipstick,
    even if I leave it out to try and get an accurate reading.
    But I am not down much if at all. If I leave the dipstick
    out for 10 minutes and then take a reading, it seems
    to be a little more accurate, as someone suggested.

    Any thoughts? Could the crankcase sensor be a little bad?
    Does that make sense at all? And the little bit of oil
    throws things into a different mode? Or some electronics
    are marginal? The car or vehicle, a minivan, has almost
    200,000 miles so things are, touch wood, that is quite
    a few miles and would not be surprised if a sensor
    or an electronic module are a tad marginal.
    Treeline, Mar 27, 2005
  2. Then it still needs doing!
    Then it still needs doing!
    There is no such sensor.

    Daniel J. Stern, Mar 27, 2005
  3. Treeline

    alec_b Guest

    We had a problem on out last van, a 93 with the 3.0. It stalled a few
    times in the course of a few months with no SES light and no symptoms.
    Know what it turned out to be? Distributor cap. So who knows.
    alec_b, Mar 27, 2005
  4. Treeline

    Treeline Guest

    That's a good guess for another problem on the same van. The distributor
    cap was replaced but it was really the wire going to the cap. But this
    was a relatively serious problem so somewhat easier to diagnose.
    The car would not start unless that wire was jiggled.
    Treeline, Mar 27, 2005
  5. Treeline

    Treeline Guest

    Good suggestion. I replaced my thermostat. Think I could do this,
    just a little harder, without a manual and dropping anything into
    the throttle? Could see the toothbrush or something falling inside.
    Really need to get the shop manual to feel comfortable and
    confidant. Waiting for the price to drop but they keep going up.
    I did check, but too late, guess the code goes after so many
    successful starts.
    Now you tell me. I listen to the Click and Clack Brothers
    that I know you just love :) Maybe I Click heard incorrectly,
    or was it Clack? Heh, I got most of the puzzlers recently.
    Now if I can translate that into cars...

    Their last puzzler, what has no moving parts but does the
    same thing as one with thousands of moving parts? That's
    an old invention?

    Air balloon and a plane? Too recent.
    Pencil and the original printing presses with all those
    thousands of letters of type needing to be set.
    You read the answer here first in this newsgroup!

    Anyway, it's a crankshaft sensor then, yes?
    Has no "moveable" parts and does the same thing that a
    distributor used to do? Since I have a distributor
    not only do I not have a crank case sensor, but I also do not
    have a crankshaft senor in the 3.0 liter Mitsubishi V-6 1994?
    Treeline, Mar 27, 2005
  6. Sure. Obtain new throttle body gaskets and bottle of Berryman's B12
    ChemTool and some bristle brushes and Q-tips. Remove throttle body. Remove
    AIS motor from throttle body. Clean throttle body, AIS motor passages in
    throttle body, and AIS motor pintle thoroughly. Reassemble and reinstall
    w/new gaskets. Not hard.
    Toothbrush = poor choice. Cleaner melts nylon bristles, and the resultant
    gummy goo will make things worse.

    Terrific source for incorrect information and stupid jokes. could be, but I wouldn't replace it without data (diagnosis)
    indicating it's not working correctly.
    No. Your 3.0 has a distributor. A crankshaft sensor just tells the engine
    control computer where the engine is, rotationally speaking. It does not
    do the same thing a distributor used to do.
    Daniel J. Stern, Mar 28, 2005
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