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jss06c6 · 02-09-2018

Well, just moved #473.. drove it two weeks ago, no issues, ran beautifully. When I started it to move it today, the car sounded like it backfired immediately upon start. But shut down instantly. I cranked it again and it started right up. Took it out for a spin around the block and it ran great, BUT, the idle is now at 1250, not 750 like it is supposed to be.

Pulled into shop and looked around the engine. The PCV plug at the back of the engine was partially popped off. Likely due to the backfire. Pushed it back down and the idle dropped to 1150.

Pulled the IAC and it was clean. Put it back in and hooked up Moates interface and launched TunerPro RT. Started the engine and the IAC is locked at 0. Engine is hunting for idle. My guess is that the IAC cratered.

Input welcomed. Any way to check the IAC before I look for a new one?

Are these IAC's available still? Jerry, do you have one for a '91?

Thanks Guys...

Sent from my XT1585 using ZR-1 Net Registry mobile app

02-09-2018	#1
jss06c6 Join Date: Aug 2015 Location: Magnolia, Texas Posts: 884	High searching Idle Well, just moved #473.. drove it two weeks ago, no issues, ran beautifully. When I started it to move it today, the car sounded like it backfired immediately upon start. But shut down instantly. I cranked it again and it started right up. Took it out for a spin around the block and it ran great, BUT, the idle is now at 1250, not 750 like it is supposed to be. Pulled into shop and looked around the engine. The PCV plug at the back of the engine was partially popped off. Likely due to the backfire. Pushed it back down and the idle dropped to 1150. Pulled the IAC and it was clean. Put it back in and hooked up Moates interface and launched TunerPro RT. Started the engine and the IAC is locked at 0. Engine is hunting for idle. My guess is that the IAC cratered. Input welcomed. Any way to check the IAC before I look for a new one? Are these IAC's available still? Jerry, do you have one for a '91? Thanks Guys... Sent from my XT1585 using ZR-1 Net Registry mobile app Last edited by jss06c6; 02-09-2018 at 06:50 PM.