New answers tagged idle
This might be normal behavior. From the book Auto Fundamentals, pg. 146-147 in the section "Cold Start Aids": During cold startup on some systems, an auxiliary air regulator admits additional air into the intake manifold to increase the idle speed. The auxiliary air regulator is controlled by a thermostatic switch located in the engine water jacket. ...
This sounds like a problem with the Idle Air Control (IAC) valve, or something in that general vicinity. You should try to clean it and the upper intake tract.
Strangely, after about 1500 miles the problem went away. I'm not sure why this is, though I was told by the individual that helped me with the replacement that new pumps sometimes require a "break in" period. I haven't heard that opinion echoed anywhere else, however it seems to have been the case for me... If it changes I will update! Thanks again for ...
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