Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

Need help waking up my 8pn 3406c

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Jcmaddox, Jun 19, 2018.

  1. Jun 19, 2018 #1
    Jcmaddox

    Jcmaddox Bobtail Member

    1
    0
    May 19, 2018
    0
    I've got a 3406c that lacks power. I've been through all the basics. Its getting plenty of fuel to the injection pump. Boost is around 25lbs full throttle. I backed the fuel and torque screws out and they made just a little difference the first 3 turns then that's all the fuel it seems to give. I eliminated the afrc and installed the cover. Low rpm range is good(moderate smoke) but it falls off about mid range on up (almost no smoke). The pump is a 7E-5888
    Any suggestions are greatly appreciated!

    SN: 8PN12421
    Eng model: 3406
    Performance spec: 2t-9420
    Rated: 425hp@1900
    Fuel timing 7.0BTC
     
    Jcmaddox, Jun 19, 2018
    Jcmaddox, Jun 19, 2018
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Jul 6, 2018 #2
    DieselTech_Aus

    DieselTech_Aus Light Load Member

    274
    309
    Dec 20, 2017
    WA
    0
    you eliminated the AFRC by blocking boost signal to it? if that's the case you have limited the rack travel and fuel volume delivered. the boost acts on the diaphragm allowing the rack to travel further once it sees boost and supply more fuel.

    you can also advance your pump timing half a tooth. alternatively fitting pencil injectors with a larger tip also works
     
    DieselTech_Aus, Jul 6, 2018
    DieselTech_Aus, Jul 6, 2018
    #2
    swaan Thanks this.
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.