How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Dan Your Own Question
Dan
Dan, Technician
Category: Construction and Road Equipment
Satisfied Customers: 5572
Experience:  17+ yrs. shop and field experience with all major brands of heavy equipment and trucks - 1995 WyoTech graduate.
65405794
Type Your Construction and Road Equipment Question Here...
Dan is online now
A new question is answered every 9 seconds

Just recently my turbo doesnt spool up on start up or at

Customer Question

Just recently my turbo doesnt spool up on start up or at anytime anymore really. Going down the road the response just isnt there anymore. It will still pull but the response isnt what it used to be. It will build up to 35 pulling like it used to but takes longer to do it. What do you think could be the issue? Turbo has over 800,000 miles on it.
Submitted: 1 year ago.
Category: Construction and Road Equipment
Expert:  Dan replied 1 year ago.

Hi my name is***** will be glad to help. If you did not calibrate the actuator with Cummins insite when you replaced it then do that first and check the vanes in the turbo for excessive carbon and soot buildup causing them to stick and not move freely. Check the turbo piping and charge air cooler for leaks causing a loss of boost pressure. another thing to verify is low power from weak injectors as they should be replaced at 500k

Expert:  Dan replied 1 year ago.

clean up and tune up the EGR system from soot and carbon as well.

Expert:  Dan replied 1 year ago.

HiCustomer Did you get this resolved or still need help?