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rough idle on start up 900

posted by  someone claiming to be george on  Tue Oct 28 10:02 CST 2008 [RELATED]

hi,92 960 24v. runs lumpy as though on 5 for first 10/15 secs then runs great. checked coils. ok. idle air control?








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    rough idle on start up 900

    posted by  DanR on  Wed Oct 29 06:21 CST 2008
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    last visit: Thu Oct 23 15:25 CST 2014
    [RELATED]

    How are those spark plugs. Using any coolant?

    DanR '94 964 340,000 miles (106,000 on the new engine)
    --
    DanR








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      rough idle on start up 900

      posted by  someone claiming to be george on  Thu Oct 30 00:47 CST 2008 [RELATED]

      havn't checked plugs yet, waiting for a plug socket. using some coolant, i think i know where your coming from.head gasket?








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    rough idle on start up 900

    posted by  spook on  Wed Oct 29 06:12 CST 2008
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    last visit: Fri Oct 24 08:06 CST 2014
    [RELATED]

    Dear george,

    May this find you well. I think you're right. When you clean the idle air control valve, be sure to keep solvent out of the motor compartment. You can do that by keeping the nose - the end opposite the electrical connector - pointed down-wards. You can use cotton-tip swabs to remove carbon. Be sure to flush away any cotton fibers, as they will jam the valve.

    Please post back with the results.

    Yours faithfully,

    Spook








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      rough idle on start up 900

      posted by  someone claiming to be george on  Thu Oct 30 00:50 CST 2008 [RELATED]

      i cleaned the iac with wd40. meby i should clean it again with solvent.








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        rough idle on start up 900

        posted by  volvito on  Thu Oct 30 03:40 CST 2008
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        last visit: Sun Mar 23 04:59 CST 2014
        [RELATED]

        I think, the Idle valve is not likeley to be the problem. Normaly the idle valve ether works or it does not. To clean it does very little or nothing. I would check for a vacum leak. MAF sensor. Coolant temperature sensor. If your car has a EGR, check it. Also the control unit for that.







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