Injector or wiring question
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Injector or wiring question
Ok I'm close to getting this truck repaired. I just need a little more info. I did the ohms test on my faulty injector and it passed. Then I unplugged all injectors except my faulty one and it's got no clicking going on.. all the other ones do. Am I looking at a bad injector or is it wiring?
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Okay I did some more tests. I turned key off and on and tested voltage at wires, 1 to 2 on all injectors wire harness, and number 5 has nothing. All the other ones are showing 8ish volts. 3 to 4 show voltage but nothing at 1 to 2.
Lead Driver
Joined: Dec 2006
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From: So. Jersey
Plug another injector into that plug on the engine harness AND then plug that bad injector into a known good plug on the engine harness. This will confirm you have a bad injector or wiring.
It's possibly bad injector. But it may be the harness, a plug, or FICM pin.
It's possibly bad injector. But it may be the harness, a plug, or FICM pin.
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
There you go. Now check the length of the harness for any rubs. Then pull FICM plug and inspect it. Hopefully it's not the FICM.
Lead Driver
Joined: Dec 2006
Posts: 6,496
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From: So. Jersey
Above is the FICM plug for injector 5.
With the injector plugged IN, unplug the FICM and ohm the OPEN pins and then ohm the CLOSE pins. Compare the readings with another injector.
If the reading are the same, it points to the FICM.
If the readings are off, suspect harness side.
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No laughing, I found the problem. Not sure if I did this or previous owner. Ill post a picture in a miinute.
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Lead Driver
Joined: Dec 2006
Posts: 6,496
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From: So. Jersey
You can see it. Middle plug 4th pin up on the left row. PIN #21 INJ 5 OPEN COIL POWER
Lead Driver
Joined: Dec 2006
Posts: 6,496
Likes: 94
From: So. Jersey
Incase anyone is having trouble seeing it, here it is highlighted a little.
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