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11-04-2020, 04:33 PM
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#15
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2018
Posts: 143
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One thing for sure is the block heater is plugged back in tonight for a 4am departure.
Really looking forward to seeing how the new shocks and front Watts link kit perform on the trip south.
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2008 Holiday Rambler 40PDQ
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11-04-2020, 04:40 PM
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#16
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Quote:
Originally Posted by Chase55
Sorry for any confusion, I do not believe the 2008 Cummins has either DPF and for sure no DEF!
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My 08' HR, with a 07' Cummins ISL, has a diesel particulate filter.
If yours doesn't, your coach came with one of the leftover 06' engines.
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Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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11-04-2020, 05:04 PM
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#17
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2018
Posts: 143
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Quote:
Originally Posted by 96 Wideglide
My 08' HR, with a 07' Cummins ISL, has a diesel particulate filter.
If yours doesn't, your coach came with one of the leftover 06' engines.
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Had to replace the turbo speed sensor a couple trips ago in 2019. It is a 2007 engine based on the ID plate. I have not seen or read where it had a DPF on it.
How can you tell?
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2008 Holiday Rambler 40PDQ
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11-04-2020, 05:08 PM
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#18
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,442
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My 2008 has a DPF. Low idle can cause them to clog so I put mine into the fast idle when not annoying neighbors while the air builds.
The Intake Heater Takes enormous power and batteries at 40-50 degrees have lost a lot of umph just to start.
Idle times can easily accumulate when you add up the air ups, sitting at lights, messing about getting in and out of parks. I highly suspect Cummins was on a steep learning curve with DPF's based on the dumpster full of them when I had to have mine replaced at very low mileage.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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11-04-2020, 05:27 PM
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#19
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2018
Posts: 143
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Well,
It will get blown out tomorrow with my heavy foot! If it has it.
__________________
2008 Holiday Rambler 40PDQ
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11-04-2020, 05:40 PM
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#20
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Senior Member
Monaco Owners Club
Join Date: May 2006
Location: Pipe Creek, TX
Posts: 688
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Quote:
Originally Posted by Chase55
The 2008 is not a DEF engine. It should not require a regen. What am I missing or concerned about?
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Not completely true, my 2008 is a DPF engine, depends on when the chassis was made.
I wonder if your cruise control is getting turned on in fast idle mode, see if your cruise indicator on the dash is on, it’s a feature to give you a high idle for warmup.
__________________
Dennis & Debbie Z (Retired) F415847
Pipe Creek, TX
2008 HR Endeavor 40PDQ / 2015 RAM 1500 Toad
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11-04-2020, 05:41 PM
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#21
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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Quote:
Originally Posted by Chase55
How can you tell?
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Don't know if this is a hard rule, but it seems the pre-DPF engines were painted black, post DPF, painted red.
If you have a DPF, there will be a couple of different hi-exhaust temp lamps in your instrument cluster.
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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11-05-2020, 06:34 PM
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#22
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2018
Posts: 143
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Quote:
Originally Posted by 96 Wideglide
Don't know if this is a hard rule, but it seems the pre-DPF engines were painted black, post DPF, painted red.
If you have a DPF, there will be a couple of different hi-exhaust temp lamps in your instrument cluster.
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It is Red! Ran like a top today! I guess DPF is something I have not seen or read through on any of the owner manuals. I was under the impression that DPF relied on DEF to function correctly like my 2015 RAM 6.7 Cummins.
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2008 Holiday Rambler 40PDQ
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11-06-2020, 06:07 AM
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#23
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Senior Member
Join Date: Jun 2011
Location: FL
Posts: 11,442
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Quote:
Originally Posted by Chase55
It is Red! Ran like a top today! I guess DPF is something I have not seen or read through on any of the owner manuals. I was under the impression that DPF relied on DEF to function correctly like my 2015 RAM 6.7 Cummins.
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No DEF on my 2008. Dpf for sure. No exhaust or Jake Brake either.
Mine has a Variable Ratio Turbo. I looked hard to find where to lube the exhaust brake mechanism and had purchased the special lube. The manual has a good picture of it. After calling Cummins I found out the Turbo handles the braking somehow.
__________________
Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
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11-06-2020, 10:38 AM
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#24
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,746
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When you first turn your key to run position, look for this symbol on your instrument cluster.
https://www.yourmechanic.com/article...-spencer-cates
If you see this, you have a DPF.
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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11-06-2020, 10:50 AM
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#25
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Senior Member
Holiday Rambler Owners Club
Join Date: Apr 2013
Location: Marysville Washington
Posts: 448
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Quote:
Originally Posted by Chase55
The 2008 is not a DEF engine. It should not require a regen. What am I missing or concerned about?
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The ISL started using a diesel particulate filter (DPF) in all engines built as of January 2007.
The ISL started using diesel exhaust fluid (DEF) a few years after that (2010?)
I think your ISL may have been going through a regen which will increase idle speed to accomplish the regen if it’s not being driven at that time.
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