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A26B · 12-07-2015

Option other than bad O2: Verify whether the 2000 rpm idle is vacuum leak or throttle related. Put a heavy book or piece of plywood over the air horn while running. Engine dies, it's throttle or IAC related, keeps running, it's vacuum.

12-07-2015	#9
A26B Join Date: Dec 2003 Location: Arcadia, OK Posts: 3,400	Re: Idle to high around 2000rpms Option other than bad O2: Verify whether the 2000 rpm idle is vacuum leak or throttle related. Put a heavy book or piece of plywood over the air horn while running. Engine dies, it's throttle or IAC related, keeps running, it's vacuum. __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1*, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed.