[snj8198]

it's not detrimental if you dont get into that 3-10 range but if you're hovering around 40 warm the motor up, shut it off, turn the front butterfly screw counter clockwise about 1/8th turn then fire it up and wait for the IAC to settle down again then take your reading. If you still read above your target then repeat procedure; if you read lower than your target range then leave the motor running and slightly turn the screw clockwise in very small increments til you get in range, then save.