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Thread: CP4 Question

  1. Top Of Page | #41
    Gerald636's Avatar

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    Re: CP4 Question

    2014. I was just wondering hoping I had a good pump and not one I’ve been reading about


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  3. Top Of Page | #42
    Gerald636's Avatar

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    Re: CP4 Question

    I’ve been out of the game awhile. Once upon a time I was a master tech for a Chevy dealer and I was strictly diesels duramax engine performance tech/electrical and some drivetrain work excluding auto trannys. At the time if anyone remembers them in my area and surrounding counties I did all recalls on the Cadillac cateras and their timing belt issues. I still do engine builds mostly LS, small block and racing engines but getting back into diesels since I own one my first in nearly 20yrs since last I had one others were Duramaxs LLY/LB7 and they were wicked fast. Now I’m oil field last 20yrs and having my current truck is a must have and slowly getting knowledge about this beast.


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  4. Top Of Page | #43
    DANG IT'S COLD! AK Bob's Avatar

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    Re: CP4 Question

    Quote Originally Posted by Gerald636 View Post
    You have a picture of what it looks like?


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    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon auxiliary fuel tank.

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    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. MM3 Tuned by Double R Diesel. Oil Bypass Filter, Fuel Filtration Kit and 50 Gallon Aux Fuel Tank.

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  6. Top Of Page | #44
    More Powa! RATLIN'HP's Avatar

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    Re: CP4 Question

    Water and lack of lubrication are cp4s biggest weakness. Biggest problem with the cp4 is our ultra low sulfur fuel and the lack of lubricant it has. The cp4 was/is a great pump where it was tested using regular old fuel, and made impressive economy numbers. Every manufacturer trying to squeeze the best MPG out, starting using it without any conclusive testing how it did with ultra low sulfur. That all said fellas, I have a lml duramax with around 75k and I do not worry about my cp4 on a daily basis. Many of our work trucks had cp4 and higher mileage, and I've never seen one grenade. Maybe I'm just lucky. I do have a air dog lift pump on mine.

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  8. Top Of Page | #45
    VENDOR cumminsdieselfreak's Avatar

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    Re: CP4 Question

    Quote Originally Posted by Chrisn162001 View Post
    The issue has been the same in all cp4s the cam roller assembly turns in the bore and no longer rolls with the cam but instead grinds the cam.
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    This.
    Quote Originally Posted by RATLIN'HP View Post
    Water and lack of lubrication are cp4s biggest weakness.

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    This in addition to the above.

    2018 Ram 2500 4x4 G56
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  9. Top Of Page | #46
    Daily Grinding! RamIt's Avatar

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    Re: CP4 Question

    Quote Originally Posted by Houston HB View Post
    do you mind sharing how or what you did.
    I’m sorry, I don’t understand what you are referencing

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  10. Top Of Page | #47
    Houston HB's Avatar

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    Re: CP4 Question

    Quote Originally Posted by Mdavlee View Post
    I used a sump on mine and retained all the factory stuff in the tank. If my Fass dies on the road I can unplug the harness and quick connect on the injection pump and go back to driving. I thought that was the better way to go in my case since I travel all over the country.
    Would you like to share the connection part?


  11. Top Of Page | #48
    Houston HB's Avatar

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    Re: CP4 Question

    Quote Originally Posted by RamIt View Post
    I’m sorry, I don’t understand what you are referencing
    I think I clicked the wrong post to quick reply.


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  13. Top Of Page | #49
    Mdavlee's Avatar

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    Re: CP4 Question

    Quote Originally Posted by Houston HB View Post
    Would you like to share the connection part?
    Which part?

    The harness plugs in to the tank to retain the fuel level and that stuff.

    I put the quick connect plug from Beans in factory fuel line.


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