Idle Speed & Mixture: Notes
NOTE:
Idle mixture is controlled by Engine Control Module (ECM) or Powertrain Control Module (PCM). Adjustment is not possible.
CAUTION:
When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES
article in GENERAL INFORMATION section before disconnecting battery.
NOTE:
On 4.3L, and 5.7L, idle speed is controlled by ECM/PCM. Slight fluctuations in idle speed are considered normal. Adjustment is not required. Refer to IAC VALVE RESET procedure.