Astra - engine rough when warmed up

Discussion in 'Astra' started by Sam Compton, Jan 30, 2006.

  1. Sam Compton

    Sam Compton Guest

    my '97 Astra 1.6i 16v (Ecotec) is idling a bit rough when warmed up, and
    hesitates when accelerating. This doesn't happen when engine is cold,
    though. I recently had a major service and cambelt change at local VX
    dealer, and on the receipt it says they've done 'gas treatment' and 'motor
    flush' etc etc, but the engine ran perfectly before they got their hands on
    it, doubt they'll believe me.
    Could there be a problem with the fitting of the new cambelt ? or is this
    likely to me a seperate issue ? like the EGR or ICV ?

    thanks for any advice,
    Sam Compton, Jan 30, 2006
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  2. Sam Compton

    mikeFNB Guest

    doubt it unless the cam sensor wires were pulled etc

    i'd guess ICV first

    mikeFNB, Jan 31, 2006
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  3. Sam Compton

    Sam Compton Guest

    Thanks , I'll try and give that a clean.
    Excuse my ignorance but why would the engine behave ok when cold and rough
    when warmed up ?

    Sam Compton, Jan 31, 2006
  4. Sam Compton

    mikeFNB Guest

    probably cause the gunk is not very liquid at low temp.

    mikeFNB, Feb 1, 2006
  5. Sam Compton

    Mike Guest

    An over rich mixture would do it as well. Why not have a quick look at the
    air filter?

    Mike, Feb 1, 2006
  6. Sam Compton

    Rob Guest

    is it a misfire could possibly be idle air control valve or ignition module
    Rob, Feb 4, 2006
  7. Sam Compton

    Sam Compton Guest

    yes - it is like a misfire (when trying to pull away from lights,1st gear,
    or roundabout, 2nd gear, between 1.5 - 3,000 rpm), and it doesn't happen
    when the engine is cold.
    many thanks to all who replied, I will have a go in the near future at your

    Sam Compton, Feb 6, 2006
  8. Sam Compton

    airsmoothed Guest

    I had a similar problem on my Omega last week ( ruuning fine cols, crap
    when warm) : turned out to be a dodgy HT lead.
    airsmoothed, Feb 9, 2006
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