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NO that's bad

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Q: Is it normal for the idle speed of a diesel engine to go up to 1100rpm when cold then drop to 800rpm after 5 mins?
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What causes an engine to run at 1100rpm instead of the normal 800rpm?

Hey Roger===If you stated the kind of car and engine you had it would be easier. Just guessing, it is either the cable to the throtle body or carb hanging or the idle solonoid needing cleaning. GoodluckJoe A sizable vacuum leak could also do that.


When you start diesel engine from cold a bit smokey is this normal?

Yes, it is normal


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It does not mix under normal conditions. If this is happening with your diesel engine you may have engine trouble.


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