03 6.0 Low circuits...

Slow6point0

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Hello guys...long time lurker, first time poster...my truck is running rough and showing codes for injectors 4 & 6 low circuit.
Truck is an 2003 f250 6.0, bone stock other than exhaust.
I have replaced the injector harness with an aftermarket one, no help.
Tried using a Different new FICM(I work at a parts store), no help.
Have now replaced injectors 4 & 6, still same codes.
Tried ohming the injectors, 4 & 6(New injectors) show right at 2 ohms, injector 2 showed 1.7 ohms, all of those should be in spec from what i can find?

What next? Is there a way to test the harness and make sure it's not defective as well?
 

046.ohBills

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I am assuming you checked shorted together and ohmed out to ground with those as well right? making sure your grounds are good is another like the post at the back of the intake.
 

Slow6point0

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By shorted do you mean jumping the connectors of the harness together to try to get it to show circuit high? i tried that by jumping pins 1 to 2 on the harness but got no change. I did not try ground however, its just hooked to the rear intake bolt like the old harness was but if that was bad it would effect all 8 injectors right?
 

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