P0271, P0277
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
Fuel injectors on cylinder 4 & 6 high(middle two on driver side). $260 each for injectors (Ford Remans) plus labor. A bit of trouble shooting is in order first however. Injectors failing like this can be verified before going in very far. Could also be FICM or injector harness.
Injector testing with a multimeter:
Testing the electrical side of the fuel injectors:
ok try this=set up the scanner to do a injector buzz test, make sure there is as littel noise as posiable around the shop so you can hear the injector solenoids click. run the buzz test and listen for the injector solenoids to click.
the test will buzz all 8 then one at a time, numbers 1-8 then it will repeat.
you should here all of them click if so the injector solenoids and wire harness from the ficm is ok. if all click except #1 disconnect the suspect fuel injector connector and test the injector pins for resistance. measure the resistance between the suspected fuel injector pins,component side.
pins 1 and 2 =0.2 to 3.0 ohms
pins 3 and 4= 0.2 to 3.0 ohms
pins 1 and 3=greater than 10,000 ohms
pins 1 and 4=greater than 10,000 ohms
pins 2 and 3=greater than 10,000 ohms
pins 2 and 4=greater than 10,000 ohms
if the resistances are not within specs the fuel injector solenoid is bad and the injector will need replaced.
if the resistances are good you need to check the ficm.
Injector testing with a multimeter:
Testing the electrical side of the fuel injectors:
ok try this=set up the scanner to do a injector buzz test, make sure there is as littel noise as posiable around the shop so you can hear the injector solenoids click. run the buzz test and listen for the injector solenoids to click.
the test will buzz all 8 then one at a time, numbers 1-8 then it will repeat.
you should here all of them click if so the injector solenoids and wire harness from the ficm is ok. if all click except #1 disconnect the suspect fuel injector connector and test the injector pins for resistance. measure the resistance between the suspected fuel injector pins,component side.
pins 1 and 2 =0.2 to 3.0 ohms
pins 3 and 4= 0.2 to 3.0 ohms
pins 1 and 3=greater than 10,000 ohms
pins 1 and 4=greater than 10,000 ohms
pins 2 and 3=greater than 10,000 ohms
pins 2 and 4=greater than 10,000 ohms
if the resistances are not within specs the fuel injector solenoid is bad and the injector will need replaced.
if the resistances are good you need to check the ficm.
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