I have been troubleshooting an "injector circuit open" code P0206 (cyl 6) since March this year. I had just let the car sit over the summer since it was too damn hot here to think about it and lots of other stuff going on.
What I have done so far (some have been deemed still useful as many existing parts were factory pieces from mid-2011 production):
Replaced the entire engine harness, all plugs, all injectors, all coils, still have the issue.
Tested resistance of each injector and they are in-spec for LU47s.
Verified signal to injectors and coils from PCM using noid lights.
Sent PCM in for repair (new ones on permanent backorder) and they said it's fine and sent it back.
Continuity tested the wires in the new harness (multimeter resistance test) and all are good, noid lights confirm signal is coming from PCM to pigtails for injector and coil.
Took off the valve cover expecting maybe a dropped valve or broken spring but nothing abnormal, no lifters or clips missing.
All grounds for PCM, engine, harness checked, cleaned, tightened.
I have gone through all of the diagnosis and troubleshooting steps in the Ford service manual for this and still the problem persists.
I'm stumped.
Compression test this weekend.
Anyone have any thoughts or ideas on this one?
I might try to see if I can arrange a PCM swap just for kicks, not sure if I will need to reteach PATS or burn a couple HPTuners credits to load my tune to a new PCM.
What I have done so far (some have been deemed still useful as many existing parts were factory pieces from mid-2011 production):
Replaced the entire engine harness, all plugs, all injectors, all coils, still have the issue.
Tested resistance of each injector and they are in-spec for LU47s.
Verified signal to injectors and coils from PCM using noid lights.
Sent PCM in for repair (new ones on permanent backorder) and they said it's fine and sent it back.
Continuity tested the wires in the new harness (multimeter resistance test) and all are good, noid lights confirm signal is coming from PCM to pigtails for injector and coil.
Took off the valve cover expecting maybe a dropped valve or broken spring but nothing abnormal, no lifters or clips missing.
All grounds for PCM, engine, harness checked, cleaned, tightened.
I have gone through all of the diagnosis and troubleshooting steps in the Ford service manual for this and still the problem persists.
I'm stumped.
Compression test this weekend.
Anyone have any thoughts or ideas on this one?
I might try to see if I can arrange a PCM swap just for kicks, not sure if I will need to reteach PATS or burn a couple HPTuners credits to load my tune to a new PCM.