CHECK HARNESS BETWEEN FUEL INJECTOR AND ECM CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from fuel injector on faulty cylinders.

3) Disconnect the connectors from the ECM.

4) Measure the resistance between ECM connector and engine ground on faulty cylinders.

Connector & terminal

#1 (E5) No. 1 — Engine ground:

#2 (E16) No. 1 — Engine ground:

#3 (E6) No. 1 — Engine ground:

#4 (E17) No. 1 — Engine ground:

QUESTION

Is the resistance 1 MΩ or more?

Yes No

Repair the ground short circuit of harness between fuel injector and ECM connector.