Discussion in 'The Garage' started by TBlaz8, Feb 19, 2007.
how do i adjust the idle on my 1989 GMC Jimmy 350 v8?
Reprogram the chip in the computer. The computer controls the idle speed. Someone sells a box that you can connect up that will allow you to bump the idle speed up and down in 50 RPM increments, but I can't recall who makes it.
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