RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > POWER TRAIN GARAGE FORUMS > Cummins Engines
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-25-2015, 12:00 AM   #1
Senior Member
 
Smitty77's Avatar
 
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 4,934
03 ISL CAPS - Puff of Dark Smoke

Have had this coach since just under 13K, now a still low miles for age 43K miles.

I have started to notice a puff of black smoke, when taking off form a start. Not always.

Seems to me to me it happens when coming to a stop after coming down a hill, or in town traffic, with Jake Compression braking assist helping prior to the stop.

The only other thing a bit different, in the last 5K miles, is that I had the ECM refreshed to 400 from 370. Timing is about the same, but it also could be a coincidence.

Am monitoring oil levels more closely (Used to just check it every few weeks, as it always stays the same.)

Wondering if I have ring blow by? Or, a seal going out on the turbo? Or, am I seeing normal behavior? (Never notice it in any other gear shift. Just from when I'm taking off after sitting at a stop.)

Sure not looking for something to worry about. But, also don't mind checking things out that this brain trust recommends I look at!

TIA,
Smitty
__________________
07 Country Coach Magna Rembrandt 45' ISX600
Roo II was our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
Smitty77 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 06-25-2015, 08:39 AM   #2
Senior Member
 
Koop's Avatar
 
Join Date: Dec 2012
Location: Full Timing
Posts: 751
64,000 miles on my CAPS ISL 400. I get an occasional puff of black soot when starting from a stop. I've gone 3,500 miles since my last oil change and haven't had to add any.

I think what you are seeing is normal, you just never noticed it before. If it was a ring issue, you would be burning oil and seeing blue smoke.
__________________
Mike
2003 Alpine Coach 40MDTS - 400HP Cummins ISL
Can Am Spyder Roadster
Koop is offline   Reply With Quote
Old 06-25-2015, 08:44 AM   #3
Senior Member
 
PushedAround's Avatar
 
Tiffin Owners Club
Join Date: Sep 2012
Location: Ambler, PA
Posts: 2,853
Blog Entries: 7
Black is fuel, the occasional puff is normal. Blue is oil, not something you want to see.
__________________
Larry & Cheryl Oscar, Louie, Ranger & Henry (our Springers)
PushedAround is offline   Reply With Quote
Old 06-25-2015, 10:21 AM   #4
Senior Member
 
Smitty77's Avatar
 
Join Date: Aug 2010
Location: Over the next hill, around the next curve...
Posts: 4,934
Thanks to you both, and I commented to the DW that I felt the color of the 'puff' indicated fuel more then burned oil.

I'll still check and monitor oil consumption a bit closer the next few months. Speculate that the ECM flash may have changed the fuel feed some while idling, with a tad more fuel. I say that, as I doubt I would have missed this over the first few years of ownership - I very seldom saw black puffs previously.

Best to you both, and all,
Smitty
__________________
07 Country Coach Magna Rembrandt 45' ISX600
Roo II was our 04 Country Coach Allure 40'
OnDRoad for The JRNY! Enjoy life...
Smitty77 is offline   Reply With Quote
Old 06-25-2015, 05:20 PM   #5
Senior Member
 
Fleetwood Owners Club
Freightliner Owners Club
Join Date: Nov 2009
Location: FORT WORTH, TEXAS
Posts: 2,027
I think the exhaust smoke is because of the re flash. you are getting more fuel faster and you end up with that puff of smoke.
Bill
__________________
2008 Newmar Mountain Aire
450 HP Cummins ISM 4000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
WILDEBILL308 is offline   Reply With Quote
Reply



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
Cummins ISL 400 Black Smoke tricotec Monaco Owner's Forum 22 06-19-2015 05:48 PM
TS Power Play Tuner for Cummins ISL 370hp CAPS Pushinacoach Cummins Engines 5 10-31-2014 11:24 PM
2004 ISL CAPS - MPG Trip Info Sharing Smitty77 Cummins Engines 0 08-23-2014 11:14 AM
2004 ISL CAPS - Slight leaking - Lift Pump? Smitty77 Cummins Engines 4 07-30-2014 10:56 AM
2003 CAPS ISL - FS1242 vs FS1015 Smitty77 Cummins Engines 8 02-04-2014 02:12 PM


All times are GMT -6. The time now is 05:18 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.