6 .0 cuts off while driving,
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Cargo Master
Joined: Sep 2015
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6 .0 cuts off while driving,
Hey guys I'm usually over in the 7.3 forum but I have a buddy with a 6.0 that's having some problems. The truck will just Flatout die while he's driving and then he will get a crank no start. Sometimes if he waits 30 minutes to an hour it will start right back up. I know on the 7.3 this would point to CPS but wasn't sure if the 6.0 had the same problems with their CPS. He is able to monitor some parameters like ICP Etc. He just changed his IPR valve and all of his values seem to be up to par when the truck is running. Thinking it is electrical, Can anyone point me in the right direction. Thanks for any help
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Cargo Master
Joined: Sep 2015
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Sorry it is a 05 and the code was p2623 before hey change the IPR valve
Hotshot
Joined: Dec 2003
Posts: 15,368
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From: Stuttgart, Ar
Since P2623 is a circuit code and you've replace the valve/solenoid it's possible that it may be in the connector or the harness itself. It could also be low ICP from a leaking failing STC fitting at the HPOP if it hasn't ever been changed out. If it starts after the truck has cooled I'd monitor the ICP running to see what it is.
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Cargo Master
Joined: Sep 2015
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Since P2623 is a circuit code and you've replace the valve/solenoid it's possible that it may be in the connector or the harness itself. It could also be low ICP from a leaking failing STC fitting at the HPOP if it hasn't ever been changed out. If it starts after the truck has cooled I'd monitor the ICP running to see what it is.
Fleet Mechanic
Joined: Nov 2016
Posts: 1,343
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You need to get a scan tool to monitor inputs from sensors.
ICP values are critical to injectors firing.
ICP values are critical to injectors firing.
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Cargo Master
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We are able to monitor ICP and seems to be within parameters
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Fleet Owner
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P2623 is for an open/grounded IPR circuit. Could be a loose connection to the IPR or, as npccpartsman posted, shorted out IPR wiring. This can cause a no-start (typically it will act up when hot)
Pull back insulation on the connector wiring to inspect. The short can even be further up in the wiring harness. Look it over for chafing. A common place is at the upper left valve cover or valve cover stud near the FICM or the intake manifold bolts where the harness routes under the air intake hose
It is very unlikely that it is a cam sensor (called a CMP on the 6.0L).
Might be worth monitoring the v-reference voltage (5 volt reference circuit) as well.
Pull back insulation on the connector wiring to inspect. The short can even be further up in the wiring harness. Look it over for chafing. A common place is at the upper left valve cover or valve cover stud near the FICM or the intake manifold bolts where the harness routes under the air intake hose
It is very unlikely that it is a cam sensor (called a CMP on the 6.0L).
Might be worth monitoring the v-reference voltage (5 volt reference circuit) as well.
Thread Starter
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Cargo Master
Joined: Sep 2015
Posts: 2,859
Likes: 365
P2623 is for an open/grounded IPR circuit. Could be a loose connection to the IPR or, as npccpartsman posted, shorted out IPR wiring. This can cause a no-start (typically it will act up when hot)
Pull back insulation on the connector wiring to inspect. The short can even be further up in the wiring harness. Look it over for chafing. A common place is at the upper left valve cover or valve cover stud near the FICM or the intake manifold bolts where the harness routes under the air intake hose
It is very unlikely that it is a cam sensor (called a CMP on the 6.0L).
Might be worth monitoring the v-reference voltage (5 volt reference circuit) as well.
Pull back insulation on the connector wiring to inspect. The short can even be further up in the wiring harness. Look it over for chafing. A common place is at the upper left valve cover or valve cover stud near the FICM or the intake manifold bolts where the harness routes under the air intake hose
It is very unlikely that it is a cam sensor (called a CMP on the 6.0L).
Might be worth monitoring the v-reference voltage (5 volt reference circuit) as well.
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