Hi guys,

I’ve been a long time reader and many of these posts have saved my bacon over the years of owning my 6.0 so I thank you all for that.

I have a new issue on my hands that no amount of reading seems to be able to solve.

Details are as follows. Truck is 2007 6.0 4wd. Egr delete with sct x4 tuner.

The truck died while driving 2 weeks ago. Restarted quickly but died again. Ran a while and then died and would not restart. Has been sitting as a cranking no start since.

I have rpm of about 170 while cranking. Good icp values as well as ipr %. However I had no cam/crank sync. With this information I installed a new ford oem cam sensor and pigtail. Verified I connected the wires correctly for the pigtail, twisted the pair together and shielded them correctly. I expected the truck to start. No such luck.

I now have cam/crank sync showing as yes on my scan tool. However I still have FICM sync showing as no. I have resistance checked wires from cam sensor to pcm with multimeter as well as headlight load tested them. Both wires are ok. I think checked my connectors at the FICM, all are tight and clean. I load tested the cam and crank signal wire from pcm to ficm and both are ok. I load tested the pcm communication wire from pcm to ficm and it is ok. I check the ficm power and grounds with a headlight and all are ok. Still will not register ficm sync on scan tool.

I am quickly running out of ideas. Any input would be greatly appreciated!

Thanks!

 

Maybe it is a bad FICM ....

 

Thanks for the fast response. I am thinking that could be the issue. I replaced the power supply board within the ficm about 4 months ago as I was having a rough running issue when cold that I narrowed down to low ficm voltage. I am wondering if my dorman replacement board has taken a dump. It seems like pcm replacement is very uncommon on these. I’m just not sure how to verify the signal from the pcm over to the ficm. If I could verify signal reaching the ficm from the pcm then I would be very confident in replacing the ficm.

 

A FICM is much more than just a power board. If the FICM MPower is 48 volts (+/-), then the power board is probably ok. Maybe you have a logic board issue.

What are the VPower and LPower voltages - KOEO and cranking?

 

I’m just back from working on the truck now. Unfortunately it gave up in the parking lot of the marina where I keep a boat to get to my water access property. Not exactly convenient but I am doing best. I started back from scratch today just to double check all my findings.

Crank show sync yes, ficm sync no. Attempt to check cam and crank signals at ficm. Pin 5 and pin 10. Meter set to hz positive lead on either pin 5 or pin 10 and negative lead to ground. No reading for either.

Thought ok we are getting somewhere now. Go back to pcm. Crank position circuit reads 160-170 at crank. Cam position circuit reads zero. check resistance for cam circuit at pcm. Resistance reads 880 ohms. Connect meter directly to cam sensor and check hz. No reading. Remove cam sensor and inspect. No obvious defects. Block is clean and smooth. Reinstall making sure it’s fully seated.

I made sure all my connections were tight and went back to the scan tool in case I disturbed something in my checks. I now have roughly 10 codes for all sorts of things. Recheck pcm and ficm connectors. All tight.

I now have all kinds of weird readings. Such as 202 EOT at KOEO? Both ficm powers others than main also read O volts now.

I ran out of time today but something funny going on now for sure.

I suspect a computer issue either pcm or ficm with all the strange readings and codes I have now but that doesn’t explain why I can’t seem to get a cam signal.

 

You got an rpm signal, so your CKP is working.

If you have checked the wiring and the cam sensor, then I would think it is "probably" ok.

You sure the FICM X3 plug is fully seated? Verify no bent pins.

https://mid-atlanticema.org/wp-conte...Tech-Guide.pdf

 

Great link. Thank you. I will check ficm connections again and report back.

 

Well it has been a long month but I finally have an update. I went over all my ficm connections again and check powers and grounds. Still had weird ficm software codes and no injector buzz. Feeling confident that it needed a ficm replacement I had it towed to nearest dealer to have ficm replaced and programmed. After being at the dealer a month, yes a month. They said yes it needs a ficm. Ok, go ahead and replace it. Then they called me and said ficm didn’t fix it. Ok.... now what? The service advisor then called a day later and said it was just an issue in programming it and all is well now. So I picked the truck up and it’s running again. Great!

Now, I’m a couple days and few hundred miles into driving it and the engine light comes on. Shoot. Here we go. So I scan it with my sct x4 and I have egr insufficient flow. Phew that makes sense because my cooler is welded shut. So I’m thinking pcm must get programmed with the ficm programming so my pcm tune to shut off egr has been set back to factory. No problem I’ll just reload the tune with my sct. I go to program on the sct and it now says device already married to another vehicle. I can’t figure out how to now get it load the tune back into my newly programmed pcm? Has anyone else run into this?

Thank you!

 

You have your pcm tied to a specific tuner. Only one that can do anything with it, is who has the tuner or get it reflashed again.

 

Do you mean have the pcm reflashed again? That’s all I can figure that happened because it had sct tune and egr off when it went into the dealer so I can only assume they reflashed the pcm. But should I not be able to program it again now with the sct because it is the same pcm?

 

It being married to another tuner is the only reason I know tuners to say that. I can set mine back to stock and it will unmary where another tuner can program. If I have any tunes on mine no other tuner can delete unless you refresh. Sounds like they flashed it and put a tune on also.

 

So the dealer must have tuned it with another programmer and now I am locked out with my programmer?

 

Exactly.
Go talk to them and see if they will put it back to stock. Then you can link up.

 

Great. Thanks. I will try to get a hold of the tech that worked on it and see what was done for programming.

 

So I spoke with the tech who replaced the ficm and programmed and the truck and he says that the ficm and pcm program together but it would have programmed back to stock and he said that the vin was correct after the programming. So I’m now stumped as to why my sct programmer thinks it’s married to another vehicle. Any input would be greatly appreciated!