Skylark L4-138 2.3L DOHC VIN D MFI QUAD 4 (1989)
Idle Speed: Adjustments
Idle Speed
The throttle plate stop screw or minimum air rate adjustment should not be considered the minimum idle speed, as on other fuel injected engines. Low
internal friction and provision for slight production variations and various operation altitudes resulted in a calibrated minimum air rate which is too low
to allow most engines to idle. The adjustment is pre-set at the factory and no further adjustment should be necessary.
CAUTION: DO NOT attempt to remove the plug and readjust the stop screw. Mis-adjustment may result in damage to the IAC valve or throttle body
and may cause a Code 35 to set.
