OEM Chevrolet Astro Idle Control Valve

Chevrolet Astro Idle Control Valve Parts Questions & Experts Answers

• Idle Speed Control
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  Q: How to replace the Idle Control Valve on Chevrolet Astro?

  A: Disconnection of the negative Battery Cable accompanied by the engine cover removal marks the first step to replace the Idle Control Valve. The Idle Control Valve harness connector receives detachment and two Idle Control Valve mounting bolts require removal with caution against applying force to the pintle to protect the worm drive threads and using liquid or solvent cleaners. Cut off the Idle Control Valve from the Throttle Body assembly while also removing its associated o-ring. The parts cleaning brush needs a tiny amount of carburetor cleaner to wipe the Idle Control Valve o-ring sealing surface along with the pintle valve seat and air passage though methyl ethyl ketone and similar solvents should be avoided. Look for damages such as cuts or cracks or distortions on the Idle Control Valve o-ring before replacing it if damage is present. New Idle Control Valve installation requires finding an exact match while measuring the distance between the pintle and mounting flange before using finger pressure for slow retraction if distance exceeds 28 mm. Clean engine oil should lubricate the o-ring before installation between the mounting holes and Throttle Body. Install the Idle Control Valve mounting bolts by tightening them to 3 n.m (26 lb in). Reposition the engine cover and reconnect the negative terminal after finishing the valve harness connector installation. The procedure to reset Idle Control Valve pintle position when no scan tool is available involves turning on the ignition for five seconds followed by turning off the ignition for ten seconds and engine startup for a proper idle speed evaluation. Using a scan tool requires connection to the dlc followed by ignition on with engine off then choosing Idle Control Valve reset from special functions and permitting the reset function until the Idle Control Valve counter stops before starting the engine to verify idle speed accuracy.