2000 - 2999: 2118

2118-CYLINDER 6 MULTIPLE MISFIRE

For a complete wiring diagram Consult Diagrams/Electrical

- When Monitored:
With the engine running.

- Set Condition:
The ECM detects multiple misfires from cylinder #6.





Diagnostic Test

1. CHECK FOR ACTIVE DTC

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

With the scan tool, erase ECM DTCs.
Test drive the vehicle and attempt to duplicate the problem.
With the scan tool, read ECM DTC's.
Did this DTC set again?

Yes

- Go To2

No

- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure.Component Tests and General Diagnostics

2. FUEL CONTAMINATION
Inspect the fuel supply for contamination.
Is the fuel contaminated?

Yes

- Remove and replace fuel throughout the fuel system.
- Perform the ECM Verification Test Ver. 1.Verification Tests

No

- Go To3

3. ENGINE COMPRESSION
Turn the ignition off.
With the scan tool, perform the Cylinder Compression Test.
Is the cylinder compression within specification for all cylinders?

Yes

- Go To4

No

- Repair as necessary.
- Perform the ECM Verification Test Ver. 1.Verification Tests

4. CYLINDER FUEL QUANTITY CORRECTION
Turn the ignition off.
With the scan tool, perform the Cylinder Fuel Quantity Correction Test.
Is each Cylinder within specifications?

Yes

- Go To5

No

- Repair or replace as necessary.
- Perform the ECM Verification Test Ver. 1.Verification Tests

5. FUEL INJECTOR LEAKAGE
Turn the ignition off.
Perform the INJECTOR LEAKAGE TEST.
Were any problems found?

Yes

- Repair or replace as necessary.
- Perform the ECM Verification Test Ver. 1.Verification Tests

No

- Test Complete.