CHECK HARNESS BETWEEN ECM AND FUEL INJECTOR.

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 and chassis ground on faulty cylinders.

Connector & terminal

#1 (B137) No. 8 (+) — Chassis ground (−):

#2 (B137) No. 9 (+) — Chassis ground (−):

#3 (B137) No. 10 (+) — Chassis ground (−):

#4 (B137) No. 11 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the short circuit of harness to power supply between ECM and fuel injector.