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

L98 IAC adjustments - ???

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Old Aug 7, 2005 | 09:27 PM
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Default L98 IAC adjustments - ???

Whats the secret to getting the IAC set correctly?

After reading the book, and before I get started....

Anyone have any advise or tricks??

Thanks,
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Old Aug 7, 2005 | 09:32 PM
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On an L98 there is no trick:
-jumper ALDL pins A&B, turn key to On and wait a minute or two
-remove the cable connector from the IAC and the jumper from the ALDL
-start the engine and set the idle to 450rpm
-shut off and connect the cable to the IAC
Job done

If you have an adjustable TPS you will likely need to tweak the idle adjustment too. See my site for details on IAC & TPS adjustment that works for my '88 L98.
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Old Aug 7, 2005 | 10:08 PM
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What he said. The only other thing to add is the pintle length adjustment before it's installed. If you're not installing a new one or re-installing the old one after a cleaning, there is no adjustment.......just a re-set.
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Old Aug 8, 2005 | 03:24 AM
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use my help
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