New injector still have same codes
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Junior User
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New injector still have same codes
Replaced injector #8 and I still have a low circuit and contribution codes. Truck runs better but it still has a miss. What else could cause it. I know the new injector is good. Could it be the FICM or the wire harness. Looking for a direction to go. What should I check next.
Hotshot
Joined: Apr 2010
Posts: 19,073
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From: Saratoga Springs,UT
could be a bad Ficm injector Driver
having 48 volts on the FICM is not 100% Guarentee that its Good
are you only getting codes for #8 cylinder
was the tip still on the injector that you replaced????
having 48 volts on the FICM is not 100% Guarentee that its Good
are you only getting codes for #8 cylinder
was the tip still on the injector that you replaced????
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From: Saratoga Springs,UT
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This is a wild thought of mine....
I am not sure if it will work or not.....
Maybe maybe not...Try using a plug from another injector...Lets say swap the plug from number 6 to number 8 vise versa...
Then if it says injector #6 low circut then you know its the harness...
I am not sure if it will work or not.....
Maybe maybe not...Try using a plug from another injector...Lets say swap the plug from number 6 to number 8 vise versa...
Then if it says injector #6 low circut then you know its the harness...
Hotshot
Joined: Apr 2010
Posts: 19,073
Likes: 243
From: Saratoga Springs,UT
This is a wild thought of mine....
I am not sure if it will work or not.....
Maybe maybe not...Try using a plug from another injector...Lets say swap the plug from number 6 to number 8 vise versa...
Then if it says injector #6 low circut then you know its the harness...
I am not sure if it will work or not.....
Maybe maybe not...Try using a plug from another injector...Lets say swap the plug from number 6 to number 8 vise versa...
Then if it says injector #6 low circut then you know its the harness...
Not to wild of thought Tyler Iv heard it mentioned before
Try to move the Low Circut code
but they both might show contribe issues since injector timing maybe off
but your onto something if the low circut moves
Cheezit has also mentioned using high beam lamp to load test circuts
Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
05-07 FICM harness 5C3Z-9D930-AA. Try Ebay. There are harnesses on there fairly often.
Hotshot
Joined: Dec 2003
Posts: 15,369
Likes: 121
From: Stuttgart, Ar
You might pull the harness out, strip off the convolute tubing, check all the wiring for chaffe's, and the plugs for bent pins. It's not shielded so unless it's broken internally you should be able to repair it. Also, check the FICM and FICM plugs for bent pins. The FICM guide posted in the tech folder can point you to which plug controls which injectors. Since #8 is right under the FICM I'm thinking a wire got FUBAR'd somewhere in that process, at least that's where I'd start.
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update.
I got it fixed. It was the FICM wire harness. Got a new one from Tousley Ford and swapped it out tonight. The truck runs great. I probably did not even need to replace the injector but o well. At least I know how to replace it now. Thanks everyone for all of the input and suggestions. You guys rock!