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C15 low power

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Harper60, Dec 10, 2018.

Page 4 of 8
  1. Dec 11, 2018 #31
    benjamin260_6

    benjamin260_6 Medium Load Member

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    Unpinch the wastegate. It only looks like you're getting more boost because you're not getting all the exhaust out of the cylinder before the next cycle starts so it builds back pressure. If you don't believe me, put a pressure gauge in your exhaust manifold, you won't be able to get that clamp off fast enough.
     
    benjamin260_6, Dec 11, 2018
    benjamin260_6, Dec 11, 2018
    #31
    Oxbow, wore out and swaan Thank this.
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  3. Dec 11, 2018 #32
    swaan

    swaan Road Train Member

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    I know right, what's with people pinching off there wastegates. Blows my mind........ stupidity everywhere.

    This contrary to some peoples thinking will not add power, but it does make a lot more intake air heat thou
     
    swaan, Dec 11, 2018
    swaan, Dec 11, 2018
    #32
    Cam Roberts and benjamin260_6 Thank this.
  4. Dec 11, 2018 #33
    Harper60

    Harper60 Bobtail Member

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    I pinched the wastegate off because the truck only builds 22 lbs with it off and was trying to figure out what's going on
     
    Harper60, Dec 11, 2018
    Harper60, Dec 11, 2018
    #33
  5. Dec 11, 2018 #34
    Harper60

    Harper60 Bobtail Member

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    Changing fuel lines now, will update this evening if it changes anything. Dumped the water seperator out last night after I got done hauling and already found little black chunks and that was 1 day old filters so I'm hoping fuel lines are the culprit
     
    Harper60, Dec 11, 2018
    Harper60, Dec 11, 2018
    #34
    jamespmack and swaan Thank this.
  7. Dec 11, 2018 #35
    benjamin260_6

    benjamin260_6 Medium Load Member

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    Aug 8, 2012
    Ontario, Canada
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    Well pinching it off doesn't do anything to help you and any extra power you feel is what's known as "the placebo effect"
     
    benjamin260_6, Dec 11, 2018
    benjamin260_6, Dec 11, 2018
    #35
    jamespmack and swaan Thank this.
  8. Dec 11, 2018 #36
    benjamin260_6

    benjamin260_6 Medium Load Member

    433
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    Aug 8, 2012
    Ontario, Canada
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    I like the guys who claim it spools faster when it's pinched off. They clearly have no idea how a wastegate works.
     
    benjamin260_6, Dec 11, 2018
    benjamin260_6, Dec 11, 2018
    #36
    jamespmack and swaan Thank this.
  9. Dec 11, 2018 #37
    Superhauler

    Superhauler TEACHER OF MEN

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    Yeah but, but more boost = more power. Right ? LOL
     
    Superhauler, Dec 11, 2018
    Superhauler, Dec 11, 2018
    #37
    jamespmack and swaan Thank this.
  10. Dec 11, 2018 #38
    Diesel Dave

    Diesel Dave Last Few of the OUTLAWS

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    Probably has a low nox file in it.
     
    Diesel Dave, Dec 11, 2018
    Diesel Dave, Dec 11, 2018
    #38
    jamespmack Thanks this.
  11. Dec 11, 2018 #39
    Harper60

    Harper60 Bobtail Member

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    Got new fuel lines, unchanged in power. Taking it to a buddy who does ecm stuff and he's gonna check to make sure it has the correct files
     
    Harper60, Dec 11, 2018
    Harper60, Dec 11, 2018
    #39
    jamespmack and Diesel Dave Thank this.
  12. Dec 11, 2018 #40
    062

    062 Road Train Member

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    Does the cel come on when you turn on the key?
    Normally low boost = high pyro
    I wonder if it’s some kind of derate?
     
    062, Dec 11, 2018
    062, Dec 11, 2018
    #40
    jamespmack Thanks this.
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