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
⌃

cat 3406e low boost??

Discussion in 'Kenworth Forum' started by olvy26, May 24, 2012.

Page 1 of 3
  1. May 24, 2012 #1
    olvy26

    olvy26 Bobtail Member

    10
    0
    May 23, 2012
    dodge city,ks
    0
    i have a 99 kw with a cat 3406e, when loaded the turbo boost its around 18-22psi, at 1500 to 1700 rpm it will go to 25psi, on 10th spd no matter the rpm, it will not boost more than 22psi.... on any hill, even an easy hill, it will lose power, and as the rpm declined, so its the turbo boost... the turbo has no wastegate, and im thinking its a turbo problem... what do u guys think? had an overhead done last week, intercooler check for leaks today.
     
    olvy26, May 24, 2012
    olvy26, May 24, 2012
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

  3. May 24, 2012 #2
    truckmechanic

    truckmechanic Medium Load Member

    534
    140
    Jan 14, 2012
    Hi Desert Ca
    0
    Have you checked for an exhaust leak at the manifold?any check engine lights come on?.how does the turbine look on the intake side of the turbo?
     
    truckmechanic, May 24, 2012
    truckmechanic, May 24, 2012
    #2
  4. May 24, 2012 #3
    olvy26

    olvy26 Bobtail Member

    10
    0
    May 23, 2012
    dodge city,ks
    0
    Yes I have,.. everything seems normal.... even if the truck its empty, that's all the boost I get, 22psi....what about the computer?... can it limit the boost?
     
    olvy26, May 24, 2012
    olvy26, May 24, 2012
    #3
  5. May 24, 2012 #4
    bender

    bender Road Train Member

    2,105
    1,356
    Jul 20, 2010
    Don't Kid Yourself
    0
    Have you considered the boost sensor?
     
    bender, May 24, 2012
    bender, May 24, 2012
    #4
  7. May 24, 2012 #5
    olvy26

    olvy26 Bobtail Member

    10
    0
    May 23, 2012
    dodge city,ks
    0
    If the boost sensor is bad, woul the computer detect it??... where is the boost control located?
     
    olvy26, May 24, 2012
    olvy26, May 24, 2012
    #5
  8. May 24, 2012 #6
    bender

    bender Road Train Member

    2,105
    1,356
    Jul 20, 2010
    Don't Kid Yourself
    0
    The boost sensor often slips through the cracks like cam position and engine speed sensors can do. They malfunction without setting a code or check lamp. The sensor is on the left front of the engine in the cylinder head above the air compressor.
     
    bender, May 24, 2012
    bender, May 24, 2012
    #6
  9. May 24, 2012 #7
    olvy26

    olvy26 Bobtail Member

    10
    0
    May 23, 2012
    dodge city,ks
    0
    Ill, take a look at it... so do I need to replace it?
     
    olvy26, May 24, 2012
    olvy26, May 24, 2012
    #7
  10. May 24, 2012 #8
    bender

    bender Road Train Member

    2,105
    1,356
    Jul 20, 2010
    Don't Kid Yourself
    0
    It's a very common cause of your issue and since there's no practical way of testing it, yes, we replace them with a known good part, a new sensor.
     
    Last edited: May 24, 2012
    bender, May 24, 2012
    bender, May 24, 2012
    #8
  11. May 24, 2012 #9
    olvy26

    olvy26 Bobtail Member

    10
    0
    May 23, 2012
    dodge city,ks
    0
    do u know like how they cost?
     
    olvy26, May 24, 2012
    olvy26, May 24, 2012
    #9
  12. May 24, 2012 #10
    bender

    bender Road Train Member

    2,105
    1,356
    Jul 20, 2010
    Don't Kid Yourself
    0
    Not off the top of my head, but I can check on it. Well, I can't get you a price. You can call a dealer with your eng ser # and AR # and they will give you a price.

    If your boost is decreasing only in top gear you may have a fuel issue causing the problem.
     
    Last edited: May 24, 2012
    bender, May 24, 2012
    bender, May 24, 2012
    #10
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

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

    • Page 1 of 3