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6v92TA Detroit lack of power

Home > Discussion Forum > Mechanic's Corner (general)

Email Author email Tom Hunt  Reply to Message reply to message  Post New Message post new message      search forums
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Re: 6v92TA Detroit lack of power Tom Hunt 5-10-08  
Help Please! I am having a real power problem, NO POWER on grades. I have rebuilt the engine and it runs good, sounds good, does not smoke but I have no power. I can not go but 10 to 15 mph on a 4% grade and I believe I should get better than that. I have new fuel and air filters. My manuel show the airbox pressure should be approx. 24 psi at full load, my airbox pressure is zero at idle and 14 psi at 1800 rpm. Does the pressure increase at full load? Any help will be greatly appreciated.
Re: 6v92TA Detroit lack of power BUBBA THE BUS TECH 5-12-08  
Pressure will increase significantly under load because of the turbo charger verses just rpm testing in the driveway. You did not say if you have a computer controled unit or mechanical govenor. The mechanical govener system may set badley or have the fuel pincher blocking rack travel or have any number of other problems. On a computer engine you need to hook it up to a scaner and see what the computer is seeing about the boost pressure and other parameters. The govoner set up is absolutely critical to get these things to make good power.
Good Luck
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