Diagnostic Aids
WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.
Check HO2S heater operation. Never solder HO2S wires.
Check for the following conditions:
- Improperly installed air intake duct.
- Collapsed air duct or air filter.
- Throttle body or intake manifold vacuum leaks.
- Faulty throttle body inlet.
- HO2S contamination.
- Contaminated fuel.
- Loose or corroded electrical connections.