CP4 recall thread (merged threads) - Y78 Jan 2022 recall campaign - Parts Available May 10 for 2020 trucks only

[cummins2020]

Dropped my 2020 off this morning. Hoping it'll be done by tomorrow afternoon. SA set the expectation that they'd need it for "2 days" but I'm hoping that's just overestimating the job's time.

 

[cummins2020]

I had mine at the dealer at 8:00am. They called at 4:45pm. and it was ready! Hang tough, your almost there!!!!!

 

[LenTex]

I had mine at the dealer at 8:00am. They called at 4:45pm. and it was ready! Hang tough, your almost there!!!!!

I got a call a few hours ago from the SA. She said it'll be around Noon-ish tomorrow. Crossing my fingers it's done before then.

 

[LenTex]

Got it back Tuesday afternoon. I think the truck is a little more responsive from a stop, and the fuel mileage went up a little bit.

 

[exiledinaz]

Got it back Tuesday afternoon. I think the truck is a little more responsive from a stop, and the fuel mileage went up a little bit.

Went to the dealer Monday said it should be a few weeks then make appointment for install. Got my fingers crossed. Congrats on yours.

 

[Nick]

Dropped my 2020 off this morning. Hoping it'll be done by tomorrow afternoon. SA set the expectation that they'd need it for "2 days" but I'm hoping that's just overestimating the job's time.

2 days seems about average. Thats how long they had mine and others .

 

[KiowaWarrior RAM]

Mine will be going in on Monday… but I’m not feeling confident on the dealer! So wish me luck!

 

[TigerRP]

I have a 2020 3500 Standard output with the 68Rfe transmission. Mine has been done for 3 weeks. I towed my fifth wheel (14500 lbs) on a three hour trip. The engine is definitely more powerful. Power comes on hard and stays steady until I get up to speed. Very smooth.

Fuel Mileage has been about the same with 19-20 in combined driving and 11 mpg towing. I’m very pleased with the change.

Anybody put the new pump stock on a dino? It feels better than my 2018 HO. Also I’m using Power Kleen as an additive, should I keep doing that additive?

Thanks for any thoughts!

 

[John Jensen]

Also I’m using Power Kleen as an additive, should I keep doing that additive?

Thanks for any thoughts!

I'm continuing my additive regimen for the same reasons I was using with the CP'4.2 pump

 

[cummins2020]

I have a 2020 3500 Standard output with the 68Rfe transmission. Mine has been done for 3 weeks. I towed my fifth wheel (14500 lbs) on a three hour trip. The engine is definitely more powerful. Power comes on hard and stays steady until I get up to speed. Very smooth.

Fuel Mileage has been about the same with 19-20 in combined driving and 11 mpg towing. I’m very pleased with the change.

Anybody put the new pump stock on a dino? It feels better than my 2018 HO. Also I’m using Power Kleen as an additive, should I keep doing that additive?

Thanks for any thoughts!

Just my thoughts, but I would continue to use additive. This diesel fuel now is sorry at best! Just my thoughts.

 

[akamac]

I was hoping for better news...
Just had my truck towed back to Dealer. New pump is thumping and clicking like a VP44.
160 miles since repair. No towing.
I hope this is not a harbinger of things to come.

 

[H3LZSN1P3R]

I was hoping for better news...
Just had my truck towed back to Dealer. New pump is thumping and clicking like a VP44.
160 miles since repair. No towing.
I hope this is not a harbinger of things to come.

Im gonna assume/hope its a dealer mess up not an issue with the new pumps

 

[akamac]

Well harbinger of bad news I am.
SA called and Tech advised lifter or engine.
Engines are long term and lifters are short term waiting list.
Can't explain the high boost after HP pump replacement and they can't tear it apart until Tuesday.
Just a heads up for you guys taking truck in for replacement. Moniter boost pressure before and after the job.
I'm without truck for at least a week.

 

[H3LZSN1P3R]

Well harbinger of bad news I am.
SA called and Tech advised lifter or engine.
Engines are long term and lifters are short term waiting list.
Can't explain the high boost after HP pump replacement and they can't tear it apart until Tuesday.
Just a heads up for you guys taking truck in for replacement. Moniter boost pressure before and after the job.
I'm without truck for at least a week.

Thats gotta be coincidence as the pump swap would not cause that

 

[cummins2020]

Well harbinger of bad news I am.
SA called and Tech advised lifter or engine.
Engines are long term and lifters are short term waiting list.
Can't explain the high boost after HP pump replacement and they can't tear it apart until Tuesday.
Just a heads up for you guys taking truck in for replacement. Moniter boost pressure before and after the job.
I'm without truck for at least a week.

Are you running 15/40wt or 10/30wt oil in your Cummins???

 

[H3LZSN1P3R]

Are you running 15/40wt or 10/30wt oil in your Cummins???

No one should be running 15w40 unless they want to void the warranty and cause a failure of the lifters

 

[cummins2020]

No one should be running 15w40 unless they want to void the warranty and cause a failure of the lifters

This is true. That is why I asked, he said it could be a lifter problem.

 

[akamac]

09-011-20 is the service bulletin.
5W40

 

[akamac]

Well I talked to a local guy and got some good news from him. The noise is not an engine noise but a fuel pressure regulator failure. I can only hope that the Tech tests the changes made before failure as the root cause. The boost #'s I was seeing are a symptom of the failure. 2PSI going down hill with 0 throttle input, high boost low MPG's at normal operating parameters.
Thanks for the concern about the oil situation, but new pump new failure at 160~200 miles seems like the answer.
I'll post as the situation develops.

 

[KiowaWarrior RAM]

Just my thoughts, but I would continue to use additive. This diesel fuel now is sorry at best! Just my thoughts.

What additive do you use? I used x3p, Lucas & trying amsoil. All have cetacean boost, lubricant. But the amsoil seems to clean injectors. Just interested