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Running on 3 and low idle speed when cold - 200 1981

posted by  someone claiming to be Rhys on  Mon May 9 17:50 CST 2005 [RELATED]

So the low idle is one of two things. Lean mixture, which would indicate the warm up regulator. To test for that, blip the throttle vigorously after the cold start. If the engine accelerates above idle quickly and without backfiring, the mixture strength is good. Second is the auxiliary air valve, which may not be opening enough to allow air in to compensate for the cold engine. You can look inside it with a small light - there should he a substantial "half moon" opening with the engine at overnight cold. If there isn't, then the valve is not opening enough.
So lean mixture, or low air flow.





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