 |
05-31-2020, 03:20 PM
|
#1
|
|
Senior Member
Join Date: Jun 2017
Posts: 203
|
Cylinder wash
My Caterpillars had an idle adjuster to keep speeds at 1100rpm. I can't find anything similar on my 8.3 Cummins. It idles at 800. Not sure that's good.
|
|
|
 |
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!
|
|
05-31-2020, 04:00 PM
|
#2
|
|
Senior Member
Damon Owners Club
Join Date: Jul 2010
Location: Annapolis,MD
Posts: 1,458
|
That is the normal idle speed, anything above that is
hard on the transmission when shifting as well as when
stopped in gear.
|
|
|
|
|
05-31-2020, 04:01 PM
|
#3
|
|
Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
|
Age is a determining factor, I don't have a high-idle feature either, I do have an electrical schematic to install one for my Spartan chassis W/ISC engine. Those MH's that do have the feature; it's usually built-into the turn signal lever as part of the cruise control. If you think that schematic will be useful, I'll post it or send by PM,whichever would be best.
Extended low idling does exactly as you state, at low idle a diesel engine will not obtain normal operating temperature either.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
|
|
|
|
|
06-01-2020, 12:49 PM
|
#4
|
|
Senior Member
Join Date: Oct 2019
Posts: 503
|
Cruise Control on, "set" button goes to one idle speed (1,000 ?) "resume " button goes higher (maybe 1,200). No sure on actual speeds, memory sucks, lol.
I use it a lot to help warm up before we head out.
__________________
1999 American Dream 40DVS
Spartan Chassis, Cummins ISC 330
|
|
|
|
|
06-01-2020, 12:52 PM
|
#5
|
|
Senior Member
Join Date: Nov 2009
Location: Warren, Oregon
Posts: 2,560
|
Mine works through the cruise control. Turn on CC, run the rpm up where you want them and hit SET. To go back to an idle step on brake or turn off CC.
2 stroker
__________________
2006 Country Coach Inspire 360 40ft Genoa Designer Series, Samsung 197 RR
Cat C9--STEEL & COPPER Bolt Together Radiator w/ updated rubber mounting
SilverLeaf 330 Magnum 2812 PSW 2011 Ford Edge Sport-Air Force One
|
|
|
|
|
06-01-2020, 12:53 PM
|
#6
|
|
Senior Member
Join Date: Oct 2019
Posts: 503
|
Quote:
Originally Posted by Mac99
That is the normal idle speed, anything above that is
hard on the transmission when shifting as well as when
stopped in gear.
|
You don't drive it with the higher speed, it's used during warm-up and for varying idle while running for whatever reason (ex: building air) so the cylinders don't wash down with fuel. The way Cummins "usually" does it with the cruise "set" button, it would cancel as soon as you use the brake (like to shift into gear) anyway. Great feature if used correctly.
__________________
1999 American Dream 40DVS
Spartan Chassis, Cummins ISC 330
|
|
|
|
|
06-01-2020, 12:55 PM
|
#7
|
|
Senior Member
Join Date: Oct 2019
Posts: 503
|
Quote:
Originally Posted by 2 Stroker
Mine works through the cruise control. Turn on CC, run the rpm up where you want them and hit SET. To go back to an idle step on brake or turn off CC.
2 stroker
|
Mine has a preset rpm using "set" and a higher preset by using "resume", but same thought.
__________________
1999 American Dream 40DVS
Spartan Chassis, Cummins ISC 330
|
|
|
|
|
06-01-2020, 01:55 PM
|
#8
|
|
Senior Member
Join Date: Jul 2014
Posts: 35,446
|
Cylinder wash and wet stacking is from the old days when fuel injectors were mechanically controlled.
With modern electronic fuel injectors, thats not going to happen.
What year is your engine ?
|
|
|
|
|
06-01-2020, 05:19 PM
|
#9
|
|
Senior Member
Join Date: Oct 2019
Posts: 503
|
Quote:
Originally Posted by twinboat
Cylinder wash and wet stacking is from the old days when fuel injectors were mechanically controlled.
With modern electronic fuel injectors, thats not going to happen.
|
Good to know 
__________________
1999 American Dream 40DVS
Spartan Chassis, Cummins ISC 330
|
|
|
|
|
06-10-2020, 11:18 AM
|
#10
|
|
Registered User
Join Date: Mar 2019
Posts: 1,336
|
Quote:
Originally Posted by Meames1
Mine has a preset rpm using "set" and a higher preset by using "resume", but same thought.
|
Standard on most
|
|
|
|
|
06-10-2020, 08:57 PM
|
#11
|
|
Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
|
Quote:
Originally Posted by Meames1
You don't drive it with the higher speed, it's used during warm-up and for varying idle while running for whatever reason (ex: building air) so the cylinders don't wash down with fuel. The way Cummins "usually" does it with the cruise "set" button, it would cancel as soon as you use the brake (like to shift into gear) anyway. Great feature if used correctly.
|
This Cummins sldeshow states cylinder wash is real.
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
|
|
|
|
|
06-11-2020, 07:08 AM
|
#12
|
|
Senior Member
Join Date: Nov 2013
Location: Elko, Nv
Posts: 2,464
|
No need to idle long enough to cause cylinder wash unless stuck on the highway for some reason and even then it would be minimal
|
|
|
|
|
06-16-2020, 08:00 AM
|
#13
|
|
Senior Member
Join Date: May 2011
Posts: 236
|
Best way to avoid it is: avoid idling.
After the air pressure is up, drive slowly away.
It makes the neighbors less testy, too, FWIW.
|
|
|
|
|
06-17-2020, 11:32 AM
|
#14
|
|
Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 30,982
|
Quote:
Originally Posted by twinboat
Cylinder wash and wet stacking is from the old days when fuel injectors were mechanically controlled.
With modern electronic fuel injectors, thats not going to happen.
What year is your engine ?
|
Cummins idling myths from June 2016
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
|
|
|
|
|
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
» Recent Discussions |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Linear Mode
