Fuel Injection System, Servicing

NOTES:
- Fuel hoses in the engine compartment must be secured with spring-type clamps. Screw-type clamps or equivalent must not be used.
- The Engine Control Module (ECM) has On Board Diagnostic (OBD) capability, and is equipped with Diagnostic Trouble Code (DTC) memory. Before repairing or adjusting any components or systems, first check DTC memory. Also check all vacuum connections for leaks ("false air").
- For proper operation of electrical and electronic components, a Battery Positive Voltage (B+) supply of at least 11.5 volts is required.
- Do not use any gasket sealers or other automotive chemical compounds that contain silicone. Traces of silicone drawn into the engine pass unburned into the exhaust and can damage the oxygen sensors.
- Do not use any electrical contact sprays or equivalent near oxygen sensor connections. Proper oxygen sensor function requires reference to outside air via the cable. If any contact spray reaches the oxygen sensor, it can cause damage or improper function.
- During some tests, malfunctions are recognized by the ECM and stored in DTC memory. For this reason, always check DTC memory after all tests and repairs, and erase DTC memory as necessary.


Safety precautions Technician Safety Information
Rules of cleanliness Vehicle Damage Warnings