GM CP4 settlement
Lead Driver
Joined: Feb 2022
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Eh, ULSD had been in wide spread use in North America since 2006-2007 and Bosch was 100% aware of the lubricity issue going back to 2003..
http://www.arb.ca.gov/fuels/gasoline...22003bosch.pdf
VE rotary pump (89-93 Cummins) and VP44 pumps (98.5-02 Cummins) also had issues with ULSD and would drop fairly regularly but of course don't super nova the rest of the fuel system when they fail.
That said, Ford won't move on from the CP4 until they are economically incentivized to do so. As of now, the failure rate they are on the hook for requires less cash flow than switching to a standyne (who probably couldn't handle FoMoCo's volume), Denso or anyone else's high pressure fuel system. I do agree the internet greatly amplifies the amount of CP4 failures kicking around out there however the economic magnitude of the failures do tend to send a shiver up the spin of the end user but I agree it is a problem that can be mitigated to a degree. That is of no comfort to those who had a CP4 give up the ghost, who I fully understand their frustrations with the system.
http://www.arb.ca.gov/fuels/gasoline...22003bosch.pdf
VE rotary pump (89-93 Cummins) and VP44 pumps (98.5-02 Cummins) also had issues with ULSD and would drop fairly regularly but of course don't super nova the rest of the fuel system when they fail.
That said, Ford won't move on from the CP4 until they are economically incentivized to do so. As of now, the failure rate they are on the hook for requires less cash flow than switching to a standyne (who probably couldn't handle FoMoCo's volume), Denso or anyone else's high pressure fuel system. I do agree the internet greatly amplifies the amount of CP4 failures kicking around out there however the economic magnitude of the failures do tend to send a shiver up the spin of the end user but I agree it is a problem that can be mitigated to a degree. That is of no comfort to those who had a CP4 give up the ghost, who I fully understand their frustrations with the system.
I didn't see the CP4 pump in that study. I think the CP4 came out later, after that report. Bosch made 60 Million of the CP4 in 2 versions though, so it does have a very good track record, just not for US trucks. I also believe Standyne would not be able to build enough pumps for Ford, let alone for the rest of their customers. At least we now have that option.
Cargo Master
Joined: Jul 2011
Posts: 2,670
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From: Walpole, MA
I didn't see the CP4 pump in that study. I think the CP4 came out later, after that report. Bosch made 60 Million of the CP4 in 2 versions though, so it does have a very good track record, just not for US trucks. I also believe Standyne would not be able to build enough pumps for Ford, let alone for the rest of their customers. At least we now have that option.
Lead Driver
Joined: Feb 2022
Posts: 7,975
Likes: 4,048
You could but then you also have to increase the fuel line diameter. It's not pressure the pump likes, it's volume. You can only push so much volume through the factory lines, at which the pressures go up, so in order for a higher volume pump, you need larger lines for that volume.
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