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YOU CAN'T. It is not adjustable and is NOT to be tampered with. VERY important to leave it alone.
You have another problem with the engine sensors if it is idleing to fast are to slow. Is the check engine light on ? If it is you need to have the engine SCANNED with an engine scanner.
Check for vacuum leak that will cause it to idle to fast. TPS/ Throttle position sensor may be bad too.
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∙ 12y ago
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How do you adjust idle speed on 1993 Chevy S10 pickup with a 2.8 liter?
May be computer controlled and not adjustable
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You can not adjust the idle screw, it is sealed off at the factory. If you are having a high idle problem check for a vacuum leak or a bad idle air control valve. These will commonly cause a high idle.
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How do you adjust the idle on a 1986 S10 Chevy pickup Tahoe edition with the 2.8?
There is no idle adjustment. The idle is controlled by the ECM. You may have vacuum leaks causing incorrect idle speed. The gasket between the throttle body and the intake manifold was known to blow out and cause a vacuum leak.
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The idle speed on a 1987 Chevy Celebrity is controlled by the engine computer, there is no way provided to adjust it.
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You don't, it is done electronically.
Idle speed adjustment for a 1991 Chevy cheyene pickup?
replace the ecm
