'97 960 Volvo rough idle

Discussion in 'Volvo 960' started by GKinser, Dec 2, 2006.

  1. GKinser

    GKinser Guest

    Our '97 960 has started running rough and has confused at least two
    mechanics. The first one replaced the MAP sensor and one injector. The
    second wanted to replace the ignition coils since they had small
    cracks. I tested this out by replacing one coil on the cylinder with a
    misfire - no change. He also checked the intake manifold for leaks and
    found none. This guy is a Volvo specialist. I checked for intake leaks
    with a spray can of injector cleaner; it seems to be leaking around the
    first two (maybe three) intake manifold sleeves and other places. One
    place that acts like it is leaking is under the intake manifold but I
    don't know that there any vacuum lines under it. I would like to find a
    vacuum diagram before I take the intake manifold off and replace the

    Any ideas?

    GKinser, Dec 2, 2006
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  2. GKinser

    Mr. V Guest

    When in doubt, clean your throttle body.
    Mr. V, Dec 2, 2006
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  3. GKinser

    dwww Guest

    My 96' 960 (130k) had the same problem. A code reader was used to
    find..I had 2 coils (cracks) out and a leaky intake manifold. The coils
    were easy to replace. The intake was fairly easy too. I left all of the
    "sleeves" on and pulled the manifold back as far as it would go (about
    1-2") cleaned the block as best I could, "slid" the new gasket in place
    and she ran like new again. If you do the intake mani yourself make
    sure you use a few extentions with a swivel and a socket.
    dwww, Jan 21, 2007
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