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Test 10: Fuel Injector Inspection
FUEL INJECTOR INSPECTION CHART
| TEST 10 |
FUEL INJECTOR INSPECTION |
| STEP |
INSPECTION |
ACTION |
| 1 |
LISTEN FOR INJECTOR OPERATION
- Warm up engine and run at idle (or cranking if engine will not start).
- Listen for "clicking" sound from the injectors (use stethoscope if necessary).
- Are all injectors "eliciting"?
|
Yes |
Go to step 3. |
| No |
Go to next step. |
| 2 |
CHECK INJECTOR RESISTANCE
- Disconnect suspect injector connectors.
- Measure resistance of injectors.
- Is resistance between 11-18 ohms (20°C (68-F})?
|
Yes |
CHECK injector driver circuits from PCM. |
| No |
REPACE injector(s).
See
FUEL INJECTORS
. Go to next step. |
| 3 |
CHECK INJECTORS FOR FUEL LEAKAGE
- Remove fuel rail assembly from intake manifold.
- Connect fuel lines.
- Remove the fuel pump relay.
- Install jumper wire between DLC terminal FP and ground.
- Key ON, Engine OFF (KOEO).
- Check for fuel leaks from injectors.
- Is fuel leakage less than 1 drop per 2 minutes?
|
Yes |
Fuel injectors are not leaking. |
| No |
REMOVE leaking injector.
See
FUEL INJECTORS
.
CHECK for leaking O-rings and fuel rail damage.
REPAIR or REPLACE as necessary. |