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
⌃

turbo flutter

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Oscar the KW, Jan 19, 2012.

  1. Jan 19, 2012 #1
    Oscar the KW

    Oscar the KW Going Tarpless

    12,246
    28,115
    May 19, 2011
    0
    Took a load out west this week. When I got up around 5000' and higher if I let it lug down to 1200rpm you could hear the turbo fluttering in the air cleaner. Get down into Nevada below 4000' and it does not do it anymore. C-15 Accert 550 with the heavy haul program. Any thoughts?
     
    Oscar the KW, Jan 19, 2012
    Oscar the KW, Jan 19, 2012
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. Jan 20, 2012 #2
    Mr. Haney

    Mr. Haney Road Train Member

    2,693
    2,040
    Dec 17, 2008
    0
    The turbos are starving for air and are surging. Are your air filters clean?

    You can easily break a turbo when this is happening.

    You have to remember that the air gets less dense as you rise in altitude. This means the turbos are going to spool much harder to fed the engine the air it requires
     
    Mr. Haney, Jan 20, 2012
    Mr. Haney, Jan 20, 2012
    #2
  4. Jan 20, 2012 #3
    Oscar the KW

    Oscar the KW Going Tarpless

    12,246
    28,115
    May 19, 2011
    0
    Air filters are only a couple of months old and look like new. If I keep it above 1250 it doesn't do it. Mr. Haney what you are saying makes sense and was my first thought. But why would it do this at a lower rpm versus higher?
     
    Oscar the KW, Jan 20, 2012
    Oscar the KW, Jan 20, 2012
    #3
  5. Jan 20, 2012 #4
    KaptainKenworth

    KaptainKenworth Bobtail Member

    33
    18
    Jan 19, 2012
    Alberta Canada
    0
    Also could have a Variable valve actuator issue.. i have come accros vva sticking and causing a flutter..its posible maybe the atmospheric pressure sensor is faulty and causing an in range fault and not logging codes
     
    KaptainKenworth, Jan 20, 2012
    KaptainKenworth, Jan 20, 2012
    #4
  7. Jan 20, 2012 #5
    Mr. Haney

    Mr. Haney Road Train Member

    2,693
    2,040
    Dec 17, 2008
    0
    I'd also wonder about the atmospheric pressure sensor myself. The ECM should calculate the fuel rate for the altitude differences. Turbo surge at low RPM is a sign of too much air entering the engine for the exhaust being expelled to drive the turbos. Low Exhaust Gas Back Pressure in the exhaust manifold versus Boost Pressure in the intake manifold

    Could you possibly have an exhaust leak before the turbo in the exhaust bellows or piping, any signs of soot?
     
    Mr. Haney, Jan 20, 2012
    Mr. Haney, Jan 20, 2012
    #5
  8. Jan 20, 2012 #6
    Oscar the KW

    Oscar the KW Going Tarpless

    12,246
    28,115
    May 19, 2011
    0
    One of the bellows has a small crack in it. The small one that is easy to change. So that could be the source of the problem?
     
    Oscar the KW, Jan 20, 2012
    Oscar the KW, Jan 20, 2012
    #6
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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