Grand Cherokee 2WD L6-4.0L VIN S (1997)
Air/Fuel Mixture: Specifications
CAUTION: Some models are equipped with a factory adjusted throttle plate position set screw. Never attempt to adjust idle mixture using this screw!
Idle mixture is electronically controlled by the Powertrain Control Module (PCM), and is not adjustable. If an idle mixture problem is suspected, check
oxygen sensor and injection system. SEE Computers And Control Systems/Testing and Inspection.
