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Old 10-06-2018, 05:11 PM   #1
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Help no power to climb a hill

I have no power to get up a hill. I have my foot to the floor and I move 1 mile an hour. I checked the transmission and full on oil. I went down the highway and it takes 4 minutes to get to 60 and it only goes 60 if I hit a hill I slow way down.

What happened I was up at the lake parked for 6 months drove home just fine then went to the gas station today and no power. My rpm at ideal does not go over 2.5 rpm?

Cummings 400. Alison transmissionan
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Old 10-06-2018, 05:15 PM   #2
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Some of the Cummins guys will be able to better advice but sounds like a fuel issue to me.
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Old 10-06-2018, 05:39 PM   #3
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I had something similar when I lost my turbo on a 2000 ISB 5.9. Max of 60, and seriously dropped speed just going over an overpass.

Without boost, at least the 5.9 Cummins didn't have any power.

I assume you're not throwing any error messages?

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Old 10-06-2018, 05:44 PM   #4
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Correct no codes what fixed yours
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Old 10-06-2018, 05:51 PM   #5
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It could be a bad turbo or the Charge Air Cooler and plumbing. If there is a leak and you can't get boost and you will not have any power. Since it is an electronic engine without the boost it it turns down the fuel. I would start by checking the boost on the Silverleaf and verify that there are no leaks in Charge Air Cooler plumbing.
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Old 10-06-2018, 05:53 PM   #6
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Sat for 6 months? Did you add anything to fuel to prevent algae growth.....like Biobore?

I would change the fuel filters as a first step.
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Old 10-06-2018, 06:11 PM   #7
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Fueling up may have stirred up a bunch of stuff in the tank.

Driving it will pull the stuff into the filters, change them first.
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Old 10-06-2018, 06:29 PM   #8
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What filters do I replace and does anybody have video or pictures?
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Old 10-06-2018, 06:38 PM   #9
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remember it has two filters one on the side of the engine , and one primary that will be close by bolted to the frame ! Change them both ::::::::!
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Old 10-07-2018, 05:50 AM   #10
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400ISL power loss.

I’ve had the same issue twice, and both times it was algae in the fuel filters. The rear-most passenger side compartment has both mounted vertically where you can get a strap wrench on them and remove them. Expect a bit of fuel spillage, so put a rag or towel down. Lube the seal ring on both new ones with Vaseline or equivalent to aid tightening. You will have to crank a bit on starting, to prime the filters, and make sure to carry a spare set. Biobor JF or another diesel algaecide is a must for any large fuel tank, and is cheap insurance with today’s biodiesel. Safe travels.
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Old 10-07-2018, 07:21 AM   #11
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In my case, I had to replace the turbo to fix it.


However, I think in your case clogged filters make as much or much sense. Plus they are a lot cheaper than a turbo.


I would start with the fuel filters.



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Old 10-07-2018, 07:38 AM   #12
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Quote:
Originally Posted by photraveller View Post

However, I think in your case clogged filters make as much or much sense. Plus they are a lot cheaper than a turbo.

I would start with the fuel filters.

Steve
I know that I live in a lowly 1986 Rockwood but I grew up selling heating oil in New England. In New England in the winter time paraffin in the diesel separates out and plugs the fuel filters giving the same symptoms you have.

Since you're in a warm climate and you sat for 6-months I'd say you have a "growth" problem in your fuel. different reason, same problem.

Buy a pan for the drippings, and a commercial hand cleaner for the odor. It doesn't take much diesel to make you stink to high heaven. Burn your rags.
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Old 10-07-2018, 08:04 AM   #13
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If you do have algae, get more filters. You may need to change them several times. Look for a black stuff in the fuel. Treat with BioboreJF.
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Old 10-07-2018, 09:29 AM   #14
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Thanks will start there and let you guys know the results
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