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Skizzlez · 08-07-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

Any pictures which would help?

Off the quickserve my info is the following:
Service model name
Isb 6.7 cm2250

Ecm code
Bz90018

Fuel pump
4983416

CPL3072

That tell ya anything?

JimT · 08-07-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

quick google search shows it's a completely different style pump then the 15L ISX. Not positive, but based on the images it looks like a rotary pump. You'll need to do some more research to see if that particular pump had any issues, but I highly doubt it has the same problem as the ISX.

If I'm wrong I'm sure someone else will correct me.

Moose · 08-10-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

It's a Bosch CP3 pump, rotary cam with plungers. It is better than the X but still likes clean fuel with low inlet restriction.

Check the air cleaner and piping, I've seen a few dusted from issues with the hoses and clamps.

I'll 3rd the tune up and normal maintenance it'll be a good truck.

Skizzlez · 08-12-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

Thanks for all the suggestions. DEF Filter changed yesterday, its on stands awaiting new tires. Will look down the intake pipe, grease everything i can find and do a good underbody inspection.

question for you guys. the EGR valve is painted green, over the red stock paint. wondering if that means it was serviced or a reman?

tree98 · 08-12-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

Usually they are green under the red paint

Skizzlez · 08-12-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

maybe i got it backwards? I'll stick a fingernail on it and pick away, see whcih ones on top.

PS, that had to be the quickest response in history -- my pc didn't even show my comment was posted, and yours was already here.

Same question though. does that mean it has been serviced/reman?

tree98 · 08-12-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

No, the new ones that come on the engine from the factory are green.

JimT · 08-14-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

Stumbled upon this article about fuel pumps and thought it might benefit this discussion.

http://www.trucktrend.com/how-to/engine/...p4-failure

The long and short of it is the cp4 pump is just like the newer pumps in the cm2250/2350/x15 and in pickups fails around the 100,000 mi mark. The cp3 is a different design, not prone to these failures, and was used on cummins pickup engines up until 2018 or 2019.

Skizzlez · 08-17-2020, **(Subject: Low mileage 2011 f750 Cummins 6.7 )**

Thanks for the fuel pump read
Wanted to throw another question to the knowledge here.

Got a 3574 code. Low def pressure.
Ran the leak test, and I get over 130psi.
How can that be? Does it take too long to build the pressure? A sensor bad?

Just got tires on it. Gotta start troubleshooting this code.

Will do some reading tomorrow, but thought I'd throw it out there.

Have a good night,
J