rough idle

Discussion in 'GM Powertrain' started by Okimaw, Mar 14, 2010.

  1. Okimaw

    Okimaw Rockstar

    My truck has been idling rough at stops and in park. It misfires and kind of vibrates when stopped in gear or in park but not consistently. It can be fine for a couple of days and then starts doing that all of the sudden, usually after it warms up (it gets real cold here in winter). When accelerating or at cruising speed there's no problems with power or anything. I'm thinking it s a plug and time for a tune up but thats just my untrained guess. Any feedback is appreciated
    Last edited: Mar 14, 2010

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