Question about adjusting the IAC...

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Sep 25, 2000 | 10:29 PM

Drowned

Thread Starter

Junior Member

Joined: Apr 2000

Posts: 64

Likes: 0

From: Guatemala, Central America

Question about adjusting the IAC...

Quote from tech article:

Quote:

Take the paper clip and open it up and form it into a big "U" shape. Insert the clip ends into the ALDL in the 'A' and 'B' pins.

Turn on the ignition, but don't start the engine. Wait 30 seconds. Now, go remove the connector from the IAC.

Start engine.

I just have to make sure about one thing. I have to remove the clip from the ALDL before starting the engine, or it will screw up my ECM, right?

Sep 26, 2000 | 12:42 AM

Tim Burgess

Supreme Member

Joined: Jul 1999

Posts: 1,335

Likes: 2

From: Tucson, AZ, USA

Car: '92 Z28; Dk Teal; Her Pkg

Engine: 305

Transmission: Richmond 6 Spd

Axle/Gears: Moser 9", Detroit Locker, 3.70

To verify that the throttle plate screw is adjusted such that the car will not idle with the IAC seated (closed), you may remove the paper clip across the ALDL terminals. Starting the engine with the terminals shorted will not harm the ECM, it will run the ECM in diagnostic mode - the check engine light flashes according to the mixture ratio, etc.

Tim

Sep 26, 2000 | 11:15 AM

Blade

Senior Member

Joined: May 2000

Posts: 980

Likes: 1

So to sum it up YES you would have to remove the paper clip before starting your engine.

------------------
92 Z28 L98 350
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Ported and polished heads, ported stock TPI base, ported plenum, Comp Cams XR270HR-10 cam (lift .495/.502 duration 218/224 lobe separation 110), Edelbrock TES headers, LT4 valve springs, Crane AFPR, Flowmaster catback with LT1 style tips, MSD coil & wires...

"Take that auto, drop it in first, hold the brakes, stomp the gas and grin from ear to ear! :-)