4.3 high idle how do you adjust it?
CPI or TBI?
Either way, it is controlled by the ECU via the IAC valve. Base idle air setting can be changed, but first you have to verify that the IAC valve is doing its job and that you do not have other contributing factors (namely vacuum leaks).
Either way, it is controlled by the ECU via the IAC valve. Base idle air setting can be changed, but first you have to verify that the IAC valve is doing its job and that you do not have other contributing factors (namely vacuum leaks).
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