Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 05-16-2013, 09:04 AM   #1
Junior Member
Join Date: Aug 2012
Posts: 8
no power going up hill in diesel 275 cummins

No power going up hills in our 2001 Fleetwood 275 Cummings. We have taken it twice to the Diesel mech and they can not find anything wrong. It does it pulling and not pulling our TJ wrangler. We are pushing the pedal to the floor and cannot get it over 30 mph. It does find on straight road and going down hill. Any one else have this problem and can give advice

Nolotam34 is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-16-2013, 09:08 AM   #2
Senior Member
Join Date: Nov 2012
Location: bis. nd
Posts: 509
if your coach is 40' then you should be down shifting as you rpm's drop to max torque...or is is downshifting just not soon enough?? as this engine at about 600lbs of torque is probably usual...jeff

' Had a London Aire..350hp sparton chassis... with all the good stuff from the time.. Just traded for a 2007 Alfa gold!! ya and picked up yesterday 9-24-16
beenthere is online now   Reply With Quote
Old 05-16-2013, 09:09 AM   #3
Senior Member
Join Date: Nov 2005
Posts: 2,815
Could be a number of things concerning the fuel system but a leak/problem with the turbo boost [eg. turbo, piping, or CAC]. Another issue [cheaper] is simply that the fuel filter[s] is/are dirty.....If there is alot of dirt in the fuel tank, it may take several filter changes and or draining/flushing the fuel tank.
Old Scout
2003 40' MDTS
Garden Ridge, Texas
Old Scout is online now   Reply With Quote
Old 05-16-2013, 09:13 AM   #4
Senior Member
Join Date: Nov 2012
Location: bis. nd
Posts: 509
here is a post in the Cummings forum

Cummins power
Okay... just returned from a 3,000+ mile winter trip and have a lot of questions and issues. This one is; who of you have added performance chips to your ISB 275 HP Cummins, and do you see a significant improvement in power and/or mileage? Mine does fine on flat or gently rolling ground but suffers badly on long and/or steep grades. I can live with it, but 35 mph on Interstate grades is not fun!
'99 Diplomat 38A- "High Plains Drifter"
'02 Wrangler Tender
' Had a London Aire..350hp sparton chassis... with all the good stuff from the time.. Just traded for a 2007 Alfa gold!! ya and picked up yesterday 9-24-16
beenthere is online now   Reply With Quote
Old 05-16-2013, 04:59 PM   #5
Senior Member
Ford Super Duty Owner
Join Date: Feb 2002
Posts: 208
beenthere you can chip it for more power BUT I think you will find that the trans. can't take the extra torque and you'll have more problems then going up the hills slow.
2001 Sea View 31' F53 1 slide
2012 Jeep Liberty Smi stay and play Duo brake system
Security by Bentley, KF6HCH, God Bless
John Wayne is offline   Reply With Quote
Old 05-16-2013, 05:15 PM   #6
Senior Member
Join Date: Nov 2005
Posts: 2,815
OK--thought this was a recent issue as opposed to always lagging on hills--that is why I suggested turbo boost or fuel filter issues. Argueably, a 275hp engine is a bit small compared to newer coaches. Each engine has its own torque band where the engine is putting out the most HP and torque at a given RPM. This band would differ by engine but assume it has to be between say 1500 and 1800 RPMs for your engine. You may have to manually shift the auto transmission down to keep and maintain optimum RPMs on a hill climb. As a side bar, higher RPMs usually results in better engine cooling during the climb as well.
Old Scout
2003 40' MDTS
Garden Ridge, Texas
Old Scout is online now   Reply With Quote
Old 05-16-2013, 05:30 PM   #7
Senior Member
Coaster1's Avatar
Join Date: Jan 2013
Posts: 371
In the case of our older/less powerful diesels. knowing what is happening is the only way to really diagnose a problem. Gauges are everything! Fuel pressure= can spot a dirty filter or bad lift or injection pump. Boost gauge= loose or leaking clamps/hoses on air intake/exhaust systems. EGT gauge= high exhaust temps, waste gate problems,
lugging engine. Trans temp, self explanatory. JMHO, yours of course may vary.
'92 Gulf Stream Sun Voyager. Tweaked 5.9 Cummins, complete interior makeover (previous owner).
Coaster1 is offline   Reply With Quote
Old 05-19-2013, 04:40 PM   #8
Senior Member
pwf16129's Avatar
Join Date: Jan 2011
Posts: 267
had a friend with this problem i did the basics air filter six years old, fuel filter three years old then had to send him to the shop, they found a slight leak on the hose on the charge air cooler but the main problem was the throttle linkage need adjustment it had slipped slightly and wasn't getting full throttle
they tightened the clamp on the cac hose and set the throttle and it ran better then ever just another thing to check
pwf16129 is offline   Reply With Quote
Old 09-17-2013, 03:03 PM   #9
Junior Member
Join Date: Feb 2013
Posts: 1
I have 2008 r.v with 325 cummins when i start up a hill red warning lite comes on and i slow down 20 or 25 it down shift to second. On level road lite goes out and it runs great it. Had it in shop several times. Fuel filters. Retorqed fuel tubes .and replaced speed sense sw. Also had it dino tested .it does not happen all the time?
Greek501 is offline   Reply With Quote
Old 09-18-2013, 07:03 AM   #10
Senior Member
charles tuit's Avatar
Winnebago Owners Club
Join Date: Feb 2008
Location: prescott az
Posts: 598
I have a 275 HP ISB. With coach loaded and toad I travel @ approximately 27,000 lbs. I live in the south west and mountain driving is frequent. Keep the RPM's above 2,000 and you will not drop below 45 MPH on most climbs and the temps will stay cool.
Charlie Tuit, 2002 Journey, 32T, XL7 toad
charles tuit is online now   Reply With Quote
Old 09-18-2013, 08:49 AM   #11
Senior Member
Wizard's Avatar

Winnebago Owners Club
Freightliner Owners Club
Join Date: Mar 2007
Location: Home on the hill in Georgia
Posts: 2,334
On anything over about 5% grade for any length, I have to manual downshift and I try to keep the RPM's around 2000. Seems to work for me.
Jerry & Patsy Potter, Taz & Jake Jr.
2000 Winnebago Journey
2006 Ford Explorer 4X4
Wizard is offline   Reply With Quote
Old 09-18-2013, 08:55 AM   #12
Senior Member
Arch Hoagland's Avatar
Monaco Owners Club
Workhorse Chassis Owner
Join Date: Aug 2002
Location: Clovis, CA, USA
Posts: 4,738
Has it always been this way or is it just recently?
2004 Monaco La Palma 36DBD, W22, 8.1, 7.1 MPG
2000 LEXUS RX300 FWD 22MPG 4020 LBS
Arch Hoagland is offline   Reply With Quote
Old 09-18-2013, 08:56 AM   #13
Senior Member
Sky_Boss's Avatar

Newmar Owners Club
Spartan Chassis
Join Date: Apr 2012
Posts: 5,576
Assuming all other mechanical issues are fine...GEAR DOWN!

As previously said, get your RPM up to 2000 or so. If you are full throttle and it drops below 1900...gear down again. Anticipate the climb. As you start up, gear down to 2100 or so and if you hold that, GREAT! If it gets below 1900, gear down again. IGNORE THE SPEEDOMETER! Watch your RPM, water and transmission temps. That being said, you may want to adjust the RPM suggestions I made based on your engine's max RPM but these shouldn't be very far off.

Even with my bigger 400 HP Cummins, I gear down. Why? My motor can handle my rig and toad fairly well in 6th gear even up through 6-7% grades. Any clue what your turbo boost must be to do that? HOT.

Dropping a gear and ignoring the speedo does a couple things, well, at least in my motor.

1. Circulates water faster through out the cooling system.
2. Revs the radiator fan up helping cool things down.

As an example, when I hit Mount Eagle on I-24 between Nashville and Chattanooga I enter the climbs @ about 1650 RPM (62ish MPH) with about 199* water and 203-205* tranny temps. Just as the climb starts and the truck lanes begin the speed limit is 55 MPH if I recall correctly. I drop to 5th and settle between 1900-2000 RPM and 55 MPH. Almost instantly my water temp drops to 190* or less and shortly later the tranny temps drop to about 193-195*. I have enough reserve to suffer minor slow downs without downshifting again but if I get below 50 MPH (around 1800 RPM) and it looks like it could get worse, I down shift to 4th.

The only thing I don't have, but want, is an exhaust gas temp gauge. I want one.

That is MY technique and serves me well. Some folks think the tranny is smarter than the driver and let the tranny do all the thinking. That is not my choice. YMMV. Besides, I'm an anal retentive, control freak.
Don, Sandee & GSD Zeus. Gardian Wings earned are GSDs Gunny (7/11/15) & Thor (5/5/15)
2006 DSDP 4320, Spartan MM IFS, 2013 CR-V, Blue Ox Avail, SMI AF1, Samsung 197R Refer.
Sky_Boss is online now   Reply With Quote
Old 09-18-2013, 09:04 AM   #14
Senior Member
Join Date: Jul 2005
Posts: 177
6 plus grades for mine (350 cat 36 journey) 35 to 37 mph is normal and 2300-2400 rpms. It will start shutting down at 2500rpms. 40,000 miles so far. Lots of miles in Idaho,Montana,Wy.


Don and Patrice
2006 Journey 36
dstinch is offline   Reply With Quote

diesel, power, cummins

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Any one chip a 275 hp Cummins wbrowning Winnebago Industries Owner's Forum 6 12-13-2011 11:34 AM
Cummins Diesel Technology to be Featured on Motorhead Garage DriVer RV Industry Press 0 09-09-2011 09:50 AM
2 Diesel Fuel Line Leaks, Any Good Cummins Mechanics in Vegas? Or should I do Myself? Cummins8.3 Cummins Engines 3 08-23-2011 10:52 AM
1990s RVs that utilized the Cummins 5.9 diesel joestewart Cummins Engines 34 06-27-2011 06:25 AM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 03:50 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.