CP4.2 Owners Club

[Wayne M.]

The Ford 6.7 lift pump is indeed 55 psi. I have a no start in my bay right now.

 

[TCDiesel]

Wayne call me.

 

[Jim W]

I agree with TC Diesel on the fuel tank levels. My wife has a 2011,VW TDI 2.0L diesel in her car and my son had one in his 2012, Golf TDI. He sold his car back to VW at 99,500+ mile, he could not pass up the buy back money. But neither of these vehicles have had any issues with the CP4 fuel pump. Since I use to design hydraulic systems for Cat. On the machines that I was designing for they used a lot of piston pumps for the hydraulic system operations. The pumps would use the hydraulic oil to cool themselves, returning about 10% of the oil that flow through them back to tank. So, cool and clean oil (fuel) is the key to a long life span on any piston pump.

I have instructed her from day one, never ever to allow the fuel gage to go below 1/4 tank full at any time. I know she follows this advice since she has me filling up her car about 90% of the time. I also enter on a spread sheet her fuel cost and gallons entered to track the fuel mileage of the car plus operating cost. Another item that I believe helps is to change the fuel filter often on any vehicle that uses a piston pump, especially a CP4 pump. On her car she is changing the fuel filter every 15,000 miles, not at the two year interval that is recommend by VW.

 

[Donnie Straps]

Maybe Fleece will come out with a CP3 kit for Cummins if the CP4-2 starts to have issues. I put there CP3 kit in my Dmax as I had read/heard of catastrophic failures with CP4's. Then they came out with CP4-1 and it also started to have issues. Guess time will tell.

 

[Tuesdak]

So far (620 miles) now... I'm good. Not too worried about it. I live 11 miles from the Chevron refinery and only get fuel from one high volume station, We have fresh diesel for sure. OptiLube XPD since day one for the extra lubricity. Unlike the 3rd gens that would let you actually run out of fuel... These 4th gen trucks tell you your on empty when you sill have almost 6 gallons in the tank, Now when I fill up the tank from near empty as the gauge reads I'm actually only getting about 26 gallons in there, My 3rd gen fill ups were 32+ gallons. Running this CP4.2 dry would take a real bone headed move. Air seems to be the pumps biggest enemy. I wonder what percentage of failed CP4.2 pumps are due to bone headedness and not it's weak design. I mean the pump can't be that bad... I heard Volvo Penta will be using it on some of it's marine diesel engines. Like I said..... I am not worried, 8 years or 125k miles until I will.

Recall the DEF tank takes 5 gallons away from the fuel tank vs. the 3 rd gens that didn't have DEF.

End of the day it's the "Fuel is your Problem" via RTFM and past denied warranty that makes the CP4 a bad gamble to New Truck buyers like me. Cummins may have held on to the CP3 as long as possible. The "Not a CP4" on GM diesels, well, someone at GM did something right after typical GM " low bidder bean counter value engineered CHEAP" on their diesels. After the class action denied warranty it's too little too late.

As always save your fuel receipts because it matters if you go rounds with your insurance and fuel station.

 

[R.Taylor]

Recall the DEF tank takes 5 gallons away from the fuel tank vs. the 3 rd gens that didn't have DEF.

No, It's a 31 gallon tank... We did not loose 5 gallons of fuel capacity in exchange for a 5 gallon DEF tank.

 

[lpennock]

No, It's a 31 gallon tank... We did not loose 5 gallons of fuel capacity in exchange for a 5 gallon DEF tank.

My 06 has a 36 Gal. My 18 only has a 32 gal. Looks like a loss of 4 gal to me.

 

[AH64ID]

35 gals on a LWB 3rd gen, 32 gals on a LWB 4th gen. 3 fewer gallons which doesn’t seem like much, but dang I really feel it.

 

[R.Taylor]

My 06 has a 36 Gal. My 18 only has a 32 gal. Looks like a loss of 4 gal to me.

2006 Quad Cab had a 35 gallon tank. 2018's have a 32 or 31 depending on model. 2019 2500/3500's have a 31 gallon tank..... Gauge reads empty after burning 26 gallons.

My 06 Mega was 34 gallons. I was just saying.... We did not loose 5 gallons of fuel to the DEF tank. There's a bit of space still under there on the driver side... Passenger side is all packed with all that witchcraft and sorcery for treating the exhaust.

 

[AH64ID]

I’m fairly certain I’ll be putting a titan 55 gallon tank in my ‘18.

 

[lpennock]

2006 Quad Cab had a 35 gallon tank. 2018's have a 32 or 31 depending on model. 2019 2500/3500's have a 31 gallon tank..... Gauge reads empty after burning 26 gallons.

My 06 Mega was 34 gallons.

Pulled the build sheets, Your right my 06 is 35 not 36. My 18 is 32. Between more reserve and a smaller tank it makes it feel like a much smaller tank. I'm pretty sure my 18 shows the low fuel light at 27 as I've always took over 27 gal even if the light had just came on. 2019 could be different though.

 

[dieselshadow]

I’m fairly certain I’ll be putting a titan 55 gallon tank in my ‘18.

I’m waiting to find out if you can correct the fuel quantity in AlphaOBD before I go down the same road.

 

[lpennock]

I’m waiting to find out if you can correct the fuel quantity in AlphaOBD before I go down the same road.

The gauge reads correct but no one has been able to get the DTE calculation correct that I've seen.

 

[Newsa]

I agree with TC Diesel on the fuel tank levels. My wife has a 2011,VW TDI 2.0L diesel in her car and my son had one in his 2012, Golf TDI. He sold his car back to VW at 99,500+ mile, he could not pass up the buy back money. But neither of these vehicles have had any issues with the CP4 fuel pump.

I think it is also best to not run the DEF system dry also. Some will undoubtedly disagree and say they want to get all the old DEF out. Running it dry might cause crystals to form?

 

[TCDiesel]

I’m fairly certain I’ll be putting a titan 55 gallon tank in my ‘18.

Make sure you install Auxiliary Fuel Filtration, that's a lot of fuel to be sitting and Not being used, You can thank me later.

The Auxiliary system will allow you to filter the fuel before the direct OEM system, its the only way to guarantee clean fuel, if in the unlikely event you purchase poor or contaminate fuel. You travel way to much to worry about buying fuel at unknow sources. Not to mention the outback.

 

[AH64ID]

I changed my tank size from 121 to 208 liters. Let’s see what happens to DTE.

@TCDiesel ill be doing the OE replacement, as I don’t want to lose bed space. Not sure what I’d add to the OE setup, as I think it’s the best of anything on the road.

 

[TFucili]

I changed my tank size from 121 to 208 liters. Let’s see what happens to DTE.

Very interested in your findings. I am pretty comfortable now in judging my actual volume remaining with the Titan 55, but if the DTE can be dialed in that would be icing on the cake.

 

[Cummins12V98]

I’m fairly certain I’ll be putting a titan 55 gallon tank in my ‘18.

I await your thoughts.

 

[TCDiesel]

I changed my tank size from 121 to 208 liters. Let’s see what happens to DTE.

@TCDiesel ill be doing the OE replacement, as I don’t want to lose bed space. Not sure what I’d add to the OE setup, as I think it’s the best of anything on the road.

I'm on board on the best for FILTERING FUEL, the only way to guarantee NO contaminate fuel, is cleared and ready for combustion fuel is Auxiliary filtration.

It must be filter before it enters the direct OEM system, My Bank Account gets it monthly deposits from miss Handled and poor stored Fuel, I would have been a victim of this Myself ,if it was NOT for My Transfer system I would have been spending $1000s in repair June 2013.

More Pictures

 

[Signal73]

TC was there a reason the factory housing and WIF light didn’t save your motor?