Vehicle Surges Or CHUGGLES: Sensor/System
- Check the Heated Oxygen Sensors (HO2S). A HO2S should respond quickly to different throttle positions. If not, inspect the suspect HO2S for silicone or other contaminants from fuel or use of improper RTV sealant. The sensors may have a White powdery coating. Silicone contamination causes a high but false HO2S signal voltage (rich exhaust indication). The Powertrain Control Module (PCM) will reduce the amount of fuel delivered to the engine, causing a severe driveability condition.
- Inspect the Mass Air Flow (MAF) sensor and related wiring.
- Check the Exhaust Gas Recirculation (EGR) system for proper operation.
- Check EGR system for proper operation.