Circuit/System Testing
WARNING: This page is about a different variant/trim than selected.
IMPORTANT:
Perform the Circuit/System Verification before proceeding with Circuit/System Testing.
- Inspect for the following conditions:
- Fuel smell or leak-Refer to Fuel Leak Diagnosis .
- A plugged air filter collapsed air intake duct-Refer to Air Cleaner Element Replacement .
- A restricted exhaust system-Refer to Symptoms - Engine Exhaust .
- Contaminants in fuel-Refer to Contaminants-in-Fuel Diagnosis .
- Install the CH-48027
to the fuel rail service port and crank the engine. See Special Tools
.
- If more than 5 inches Hg of vacuum was present during cranking, replace the fuel filter and inspect the fuel system restrictions.
- Perform the Engine Compression Test. Refer to Engine Compression Test
.
- If any fuel vapor was emitted during the engine compression test, replace the affected fuel injector. Refer to Fuel Injector Replacement (Left) or Fuel Injector Replacement (Right) .
IMPORTANT: During the replacement of the injectors, inspect the inlet and outlet fittings for corrosion or contamination. Refer to Contaminants-in-Fuel Diagnosis . - Assemble all disconnected components. Prime the fuel system to at least 10 psi. Attempt to start the engine.
- If the engine does start, refer to Fuel System Diagnosis .
- If the engine does not start, refer to Fuel System Diagnosis - High Pressure Side .