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Warm Idle High 200 80

posted by  someone claiming to be Nirmal on  Tue Dec 5 17:27 CST 2000 [RELATED]

I just had a mechanic work on my 240 which had a cold start problem. It would start but idle was low and sometimes cut out. I think the auto choke was not working. Anyway the guy adjusted the air valve and idle and now it idles well when cold. But in the eveneings on my return home, when it is warm the car idles high at around 1500rpm. I tried adjusting the plastic idle knob on the manifold but like one of the posts said, nada.

Any help will be most appreciated. The old girl doesn't have much left in her, pushing 230k so I need to look after her.







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    Re:Warm Idle High& QUESTIONforGROUP 200 80

    posted by  someone claiming to be Ben on  Wed Dec 6 02:37 CST 2000 [RELATED]

    My 81 wagon (with k-jet) has the same problem, although the plastic adjuster works for me.

    The problem is that when I set it right for cold engine, rev is too high when warm and vice

    versa.

    Question for the group: what are the symptoms of warn injector seals. Could this be a fix?







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      Re:Warm Idle High& QUESTIONforGROUP 200 80

      posted by  someone claiming to be dave lotman on  Wed Dec 6 08:28 CST 2000 [RELATED]

      You may still have a vacuum leak somewhere. To check for worn injector

      seals the best method is to replace them. If its been more than 3 years

      for a turbo or 4-5 years for a normally aspirated car then I would replace

      them so you have the security of knowing they're good. If you really want

      to check you can spray the injector with the cleaner that is sold for

      cleaning throttle bodies. Its similiar to carb cleaner, which you can also

      use.

      If the warm idle is too high then I would check for more vacuum leaks,

      and if you can't find any set the idle to what it should be warm. Let

      the engine get cold and perform the adjustment on the Auxiliary Air

      Valve to open it up some more. This will raise the idle more when its

      cold. Just make sure that the valve is closing all the way when warm.

      Another problem I had was a lack of power getting to the Aux Air Valve.

      I had a bad fuel pump relay in a 1981 that I had and this caused the

      computer to not get power as well as the Aux Air Valve and the Control

      Pressure Regulator.






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