Lack Of Power, Sluggish Or Spongy: Sensor/System
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 Pontiac Grand Prix, 2003 Pontiac Bonneville, 2003 Chevrolet Monte Carlo, 2003 Chevrolet Impala, and 2003 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for excessive spark retard activity using a scan tool. See KNOCK SENSOR under INPUT DEVICES in THEORY & OPERATION - 3.8L BONNEVILLE, GRAND PRIX, IMPALA, LESABRE, MONTE CARLO, PARK AVENUE & REGAL article for Knock Sensor (KS) system description.
- Inspect the Exhaust Gas Recirculation (EGR) system for proper operation. See EXHAUST GAS RECIRCULATION for EGR system description.
- Inspect for a restricted air intake system. See AIR INDUCTION SYSTEMS in THEORY & OPERATION - 3.8L BONNEVILLE, GRAND PRIX, IMPALA, LESABRE, MONTE CARLO, PARK AVENUE & REGAL article for air intake system description.