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Last night i was trying to adjust my IAC to around 10 to 20. Its currently reading at about 40 at idle. I adjusted the throttle stop screw and i couldn't get the IAC counts to drop. I think i read some where that you need to shut the car down after each 1/4 or 1/2 turn of the screw? Is this correct? Or should i have seen a change in the IAC counts with out turning the car off. I'm going to try and do this again today and just wanted some pointers. TIA.

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1986 T-Type

Daily Driver
1991 Lumina Z34
 

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Yes screw it inwards and reset after each turn or so. Reset the TPS as soon as it gets out of whack too.
 

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