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Thread: 2011 RAM 6.7L Cummins Not Building Boost!

  1. Top Of Page | #1

    2011 RAM 6.7L Cummins Not Building Boost!

    I have a 2011 Mega Cab with a 2nd Gen swap with an S464.

    The truck has been tuned since, and now the truck feels sluggish; the RaceME tuner only reads ten psi of boost, and my fuel rail pressure shoots up to 23000 psi; which would cause that?


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  3. Top Of Page | #2
    I WILL STAND! AK Bob's Avatar

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    2011 RAM 6.7L Cummins Not Building Boost!

    Monitor actual vs. desired boost and rail pressure PIDs.

    Do you have any trouble codes?

    Have you checked for boost leaks?

    2014 RAM 3500 (Aisin) 3.73 4X4 Limited Crew Cab Long Bed DRW. Oil Bypass Filter, Fuel Filtration Kit, Cold Air Intake, City Diesel Actuator and 50 Gallon Aux Fuel Tank.

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  5. Top Of Page | #3

    2011 RAM 6.7L Cummins Not Building Boost!

    No codes and no boost leaks.


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  7. Top Of Page | #4
    Watch Dog! Corkey's Avatar

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    2011 RAM 6.7L Cummins Not Building Boost!

    Exactly what AK BOB said.

    If the A\D is off, I would lean towards the FCA being bad on the CP3.

    The fuel rail pressure sensor is not too common but does go out eventually.

    Do you have a shim kit or plug on the fuel rail?

    II 60HP STICKS, II 33% CP3, II S464 2ND GEN SWAP, FASS 165 TITANIUM SIGNATURE SERIES, AFE INTAKE HORN, S&B FILTER, 5" TURBO BACK, ALPHAREX HEAD LIGHTS, 38X13.5X20 RAZOR M/T, MOTO METAL RIMS, 6" LA LIFT KIT, COMPLET MM3 KIT, BUILT TRANSMISSION, 6 BOLT REDHEAD STEERING BOX

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  9. Top Of Page | #5

    2011 RAM 6.7L Cummins Not Building Boost!

    I have a plug on the fuel rail.


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  11. Top Of Page | #6
    Watch Dog! Corkey's Avatar

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    2011 RAM 6.7L Cummins Not Building Boost!

    Ok, that helps narrow out fuel is being dumped out at the rail then.

    Let us know what the actual vs. desired is; pretty sure it'll be off.

    II 60HP STICKS, II 33% CP3, II S464 2ND GEN SWAP, FASS 165 TITANIUM SIGNATURE SERIES, AFE INTAKE HORN, S&B FILTER, 5" TURBO BACK, ALPHAREX HEAD LIGHTS, 38X13.5X20 RAZOR M/T, MOTO METAL RIMS, 6" LA LIFT KIT, COMPLET MM3 KIT, BUILT TRANSMISSION, 6 BOLT REDHEAD STEERING BOX

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  13. Top Of Page | #7

    2011 RAM 6.7L Cummins Not Building Boost!

    I’ll update you in the morning when I drive it again; thank you all so much.


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  15. Top Of Page | #8
    Watch Dog! Corkey's Avatar

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    2011 RAM 6.7L Cummins Not Building Boost!

    I understand that.

    Your issue is most likely the fuel control actuator, and it is sending the wrong signal to the rail, which is saying it is giving X amount of fuel but only getting Y amount.

    Hints why you are only getting 10psi of boost at WOT, as stated in the thread.

    Easy fix, though, as it's one connection on the back of the CP3 and a cheaper part.

    Don't start buying parts yet, do what's mentioned before wasting money.

    II 60HP STICKS, II 33% CP3, II S464 2ND GEN SWAP, FASS 165 TITANIUM SIGNATURE SERIES, AFE INTAKE HORN, S&B FILTER, 5" TURBO BACK, ALPHAREX HEAD LIGHTS, 38X13.5X20 RAZOR M/T, MOTO METAL RIMS, 6" LA LIFT KIT, COMPLET MM3 KIT, BUILT TRANSMISSION, 6 BOLT REDHEAD STEERING BOX

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  17. Top Of Page | #9

    2011 RAM 6.7L Cummins Not Building Boost!

    Thank you sorry I didn’t see some of the replies; they just popped up.


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  19. Top Of Page | #10
    Watch Dog! Corkey's Avatar

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    2011 RAM 6.7L Cummins Not Building Boost!

    No worries, friend

    How many miles are on the truck and CP3 if it's the original?

    II 60HP STICKS, II 33% CP3, II S464 2ND GEN SWAP, FASS 165 TITANIUM SIGNATURE SERIES, AFE INTAKE HORN, S&B FILTER, 5" TURBO BACK, ALPHAREX HEAD LIGHTS, 38X13.5X20 RAZOR M/T, MOTO METAL RIMS, 6" LA LIFT KIT, COMPLET MM3 KIT, BUILT TRANSMISSION, 6 BOLT REDHEAD STEERING BOX

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