C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Setting Idle...

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Old Sep 28, 2001 | 07:13 PM
  #1  
Nomar116's Avatar
Nomar116
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Burning Brakes
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From: Lemoore CA
Default Setting Idle...

How is this properly done. I have read several web pages and things, and some info just doesnt seem correct. One said to ground the ALDL A and B start the motor let it idle then stop the motor and disconnect the IAC before adjusting. Do you really start the motor with the aldl grounded though? Other than that if someone could just walk through it especially where this alledged screw is and how much it'll take to adjust Im thinking Im a little low at around 600 as the car hunts and really wants to die sometimes at idle... Thought Id see how a slightly higher idle might help.
Paul
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Old Sep 28, 2001 | 10:16 PM
  #2  
Rich B.'s Avatar
Rich B.
Melting Slicks
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From: Lockport NY
Default Re: Setting Idle... (Nomar116)

There's a good walk-through on 65Z01's site -
http://www.geocities.com/jgkov/index.html

Look under the IAC Adjustment...

You jumper the ALDL to fully extend the IAC pintle, and to put it in Diagnostic mode so that the rest of the adjustment doesn't set any error codes...The adjustment screw is on the plate at the drivers side of the throttle body where the cables attach...
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Old Sep 29, 2001 | 09:28 AM
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Aaron's 87's Avatar
Aaron's 87
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From: Sarasota FL
Default Re: Setting Idle... (Nomar116)

When you change your car's factory parts (ie cam), you can forget about many factory procedures. You can throw the idle set procedure out the window. You will have to make many changes in the programming to get the car to idle right.
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