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Young1 · 05-14-2024

Quote from service manual

Incorrect minimum idle speed may be caused by foreign material accumulation in the throttle, bore caulking, on the throttle valve, or on the throttle shaft.

Also a little research indicates to remove the IAC idle air control on the passenger side of the Plenum. It?s round with two small flanges, remove it, clean it and clean the passages in the plenum.

Hope this helps for your high miler

05-14-2024	#7
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 904	Re: High idle Quote from service manual Incorrect minimum idle speed may be caused by foreign material accumulation in the throttle, bore caulking, on the throttle valve, or on the throttle shaft. Also a little research indicates to remove the IAC idle air control on the passenger side of the Plenum. It?s round with two small flanges, remove it, clean it and clean the passages in the plenum. Hope this helps for your high miler __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.