Rough idle when damp

Discussion in 'Engine' started by Whitey, Jun 25, 2011.

  1. Whitey

    Whitey Hardcore MB Enthusiast

    Messages:
    433
    Joined:
    Jan 3, 2008
    Location:
    Surbiton, Surrey
    Car:
    Seat Arosa 1.4 Auto :-(
    Hi guys

    This just may be a characteristic of an 'old' car, but I have noticed a pattern that if it is raining/has rained my car will start like it is running on 3 cylinders.

    Turn it off/on and back to normal with a slight lumpy idle.

    Today with it being dry it starts and idle almost exceptionally well.

    Any ideas ?

    I've check the usual connections, leads etc. Just wondering if it could be a sensor issue ?

    Thanks !

    Chris
     
  2. donubenz

    donubenz Hardcore MB Enthusiast

    Messages:
    237
    Joined:
    Jun 16, 2011
    Location:
    Grimsby
    Car:
    w211 r230
    Had a car once that I only used for short trips to work, 3 miles or so. It always used a lot of distributor caps and had a misfire in damp weather. The garage believed that the engine was not getting hot enough to drive out any condensation from the engine. When the weather was damp the moisture condensed in the distributor cap and caused a misfire. Worth a look and a wipe out.
     
  3. OP
    OP
    Whitey

    Whitey Hardcore MB Enthusiast

    Messages:
    433
    Joined:
    Jan 3, 2008
    Location:
    Surbiton, Surrey
    Car:
    Seat Arosa 1.4 Auto :-(
    Thanks for the input, but I don't have a distributor !
     
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