Stalls Under ~700 RM - Cam Sensor codes - replaced sensor
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5th Gear
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Stalls Under ~700 RM - Cam Sensor codes - replaced sensor
Hey guys, replaced the IPR about 500 miles ago, but now I'm able to get the engine to start up/fire up every time I crank it over, but it sometimes will idle around 700 rpms, and other times it won't and just dies like shut the switch off. IPC pressure is very good, and if I keep the RPMs up above 700 it runs great. I just put a Standard brand Camshaft sensor in it because it threw a cam code signal circ/open 2614 and shut off on the highway. I replaced that sensor and now it starts and runs above 700rpm. Also, I ohmed out the wires from the pcm plug and they seem good down to the sensor. Also has thrown a P0341 ocassionally over the years, but hasn't ever had this problem. I don't lose cam/crank sync or ficm sync until below 300rpms when it dies.
Fleet Owner
Joined: Nov 2003
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I would try an OEM Cam sensor. I am not a big fan of Standard Brand electronic parts.
The 3 most common causes of sudden dying in a 6.0L (IMO) are the IPR, the FICM, and the CMP. Codes should be present to help in the investigation, but remember --- a stalling event can result in a cam or crank sensor code without the real issue being either the CKP or CMP. Another possible cause would be an issue with low ICP pressure.
Do you know if your STC fitting has ever been upgraded?
Where did you buy the IPR?
The 3 most common causes of sudden dying in a 6.0L (IMO) are the IPR, the FICM, and the CMP. Codes should be present to help in the investigation, but remember --- a stalling event can result in a cam or crank sensor code without the real issue being either the CKP or CMP. Another possible cause would be an issue with low ICP pressure.
Do you know if your STC fitting has ever been upgraded?
Where did you buy the IPR?
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5th Gear
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I bought the IPR from KC Turbos. I think the SCT has been updated. ICP Pressure seems to be good and once before it stalled it even ramped itself up but still died. AND i was able to use forscan to command pressure to 1000psi and it still died then as well.
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5th Gear
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I will be double checking fuel pressure/quality/no bubbles before I go any farther. Also going to re-charge my batteries, check and make sure both are good, and then I have a brand new cam AND crank sensor that are both motorcraft to install. I also have the new long wire to replace the old connector on the cam sensor. I have internittently gotten a P0341 for years and years but never any issues until now. And the "camshaft pos signal output circ/open, but you said that can happen after engine stalls. I just did replace the power board in my FICM with a doorman one from autozone about 2 weeks ago becuase my injector buzz died. Now I'm 48 or 48.5 volts and buzz test is good.
Fleet Owner
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Not a Dorman fan either, but maybe it will be good for you, just be aware that there is also a logic board in the FICM that can (and does) fail. No real way we can test that board - have to send it off to CircuitBoardMedics.com or FICMrepair.com to get both boards tested.
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5th Gear
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I am hoping that logic board isn't what's going bad, that or the wiring harness or the PCM. But we'll see. I may be able to get ahold of a known good FICM if none of my fixes work.
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Fleet Owner
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Keep us informed, a bad PCM is about always my LAST suspicion.
Last edited by bismic; Oct 10, 2025 at 03:42 PM.
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So, we put the new motorcraft cam sensor in and new pigtail. No more stalling! So that's great. However, (this was also happening before, but not it seems to be the main problem,) Under semi heavy throttle above 3000 rpm the truck seems to wanna cut out and or hit what feels like rev limiter or fuel cut. It doesn't stall or anything, but loses power and drops a few hundred RPM. Any ideas?
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