Circuit/System Testing
- Verify none of the following conditions exist:
- The air intake duct system for loose connecting clamps, cracks, or other damage
- The air intake duct system for being collapsed or restricted possibly by a restricted air filter
- A damaged throttle body blade or shaft
- Splits, kinks, or improper connections at the vacuum hoses
- Missing, restricted, or leaking exhaust components-Refer to Symptoms - Engine Exhaust .
- Vacuum leaks at the intake manifold, throttle body, and injector O-rings
- If all conditions test normal, test the engine for a mechanical condition. Refer to Symptoms - Engine Mechanical .