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Old 04-02-2010, 09:58 AM   #1
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Lacking power

I just purchased a 2003 fleetwood 39 footer it lacks power on hills any thing i could do to get a little more power

I have the 8.3 cummins all stock with allison 3000mh

Thanks in advance

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Old 04-02-2010, 10:44 AM   #2
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All these upgrades will help tremendously...we have them all in stock, give us a call 877-786-1576

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Old 04-02-2010, 11:17 AM   #3
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Hi jarias,
Since you have little history with the engine, have it checked out by a certified shop. Make sure the engine is performing as it is designed. If you still unhappy, Jon's company has an excellent product line up for you to consider.
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Old 04-03-2010, 07:44 PM   #4
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Can't that 8.3 be chipped anywhere from 300 to 450 HP?
What year and rating is it?
Some are limited by the torque rating of the trans, but I'm pretty sure a cummins shop will reprogram it to that limit.

As brazel said, anything you can do to remove flow restrictions, intake or exhaust side, will help. But the chip is where the rear power is.
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Old 04-03-2010, 10:11 PM   #5
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Have you taken it to a Cummins facility and have the engine checked for any problems?
Jim & SherrySeward

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Old 04-04-2010, 06:39 AM   #6
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First thing I think of in this situation is fuel filter partially clogged. Been there etc.
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Old 04-04-2010, 07:01 AM   #7
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I agree with Doc. Also, been there and done that. Had low power and then changed my fuel filters. Made a lot of difference. I have and EGT and Boost gauge. With a partially blocked fuel filter the EGTs drop and without a good heated exhaust the turbo can't spin up and make boost so you loose power.
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Old 04-05-2010, 05:58 PM   #8
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How fast are you able to go up the hills? What's the grade? My 300HP Cat climbs the 6% grade for 8 miles out of Bullhead City at 55MPH without "flooring" it.
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Old 04-06-2010, 01:44 AM   #9
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I had a mechanic go thru coach advised the 1 injector is not working i climb 6 grade hills at about 35 pedal to the floor

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