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) Turn the ignition switch to ON.

4) Measure the voltage between ECM connector and chassis ground on faulty cylinders.

Connector & terminal

#1 (B134) No. 17 (+) — Chassis ground (−):

#2 (B134) No. 16 (+) — Chassis ground (−):

#3 (B134) No. 27 (+) — Chassis ground (−):

#4 (B134) No. 26 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the short to power supply in harness between ECM connector and fuel injector. After repair, replace the ECM.