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12-19-2020, 09:41 AM
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#365
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Senior Member
Join Date: Oct 2020
Posts: 588
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Quote:
Originally Posted by Mile Marker 42
For preventive measures, couldn't a CAPS owner simply install a 12V pump near the tank, wire it to come on when key is in run position and push fuel towards lift pump without doing anything else? Is there a reason this can't be done?
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I've actually been considering an even easier solution..... Why can't you just wire the lift pump to run continuously??
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12-19-2020, 09:57 AM
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#366
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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I don't think it's made to continuously and would probably overheat.
Quote:
Originally Posted by Fffrank
I've actually been considering an even easier solution..... Why can't you just wire the lift pump to run continuously??
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__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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12-19-2020, 10:32 AM
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#367
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Member
Join Date: Apr 2019
Location: Southwest Florida
Posts: 56
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Frank,
I feel for you man. This has been painful to watch. DW and I are looking at our first rig now, mostly mid 2000's DP's and I am a little scared now. Is gas really the way to go? How about the ISB or CAT's, do they have these issues too? Well sorry for the sidetrack, good luck getting her going, we're prayin for ya.
Chuck
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12-19-2020, 11:13 AM
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#368
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Senior Member
Monaco Owners Club
Join Date: Oct 2020
Posts: 455
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I wouldn’t be worried about getting an RV with the ISC. Just know that the lift pump is a known issue, and plan to replace it or the gasket. If you look in just this thread there are a lot of guys with the ISC. And Bob Jones and I have the same exact coach as the OP.
Bob has replaced his lift pump as preventative maintenance and I’m replacing my gasket. The gasket is 15$ and you can replace it with hand tools.
Imo, I would much rather have an older coach without all the emissions crap. You wanna talk about expensive to replace. DPF’s and regen systems....
I think what is happening to Frank is always a possibility, (worst case scenario) but I haven’t read about it happening very often in my research on the ISC engine
__________________
2000 Monaco Diplomat 38A
Cummins 8.3 ISC 315HP
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12-19-2020, 11:32 AM
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#369
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Senior Member
Join Date: Oct 2020
Posts: 588
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I wouldn't even consider gas. I've driven v10 coaches and there's no comparison. These kinds of issues can happen and are expensive to fix but a 20 year old gas engine could have blown up just as easily.
I should have recognized before my trip that the lift pump was leaking. I knew I had something leaking but couldn't work out what it was. I didn't know that diesel didn't have the sulphur smell that gas does - I thought I had a grey tank leak and only while parked on a slope.
I've been through similar issues in my years of boat ownership - it's what you sign up for to join this club. I'm nervous that the RV is going to be death by a thousand cuts..... But hopefully that feeling will pass when I get back on the road.
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12-19-2020, 11:36 AM
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#370
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Senior Member
Join Date: May 2013
Location: S. California
Posts: 1,379
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Can someone please answer this: For preventive measures, couldn't a CAPS owner simply install a 12V pump near the tank, wire it to come on when key is in run position and push fuel towards lift pump without doing anything else? Is there a reason this can't be done?
__________________
2003 Monaco Knight 36ft PST Triple Slide- 315 ISC
2007 Jeep Grand Cherokee 3.0 Diesel 4x4
2- 2013 Yamaha VXR's 70MPH+. 2019 Sun Tracker 18ft Pontoon w/ 75hp Mercury
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12-19-2020, 12:00 PM
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#371
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Senior Member
Winnebago Owners Club Freightliner Owners Club RV Trip Wizard
Join Date: Nov 2018
Posts: 229
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Fass
Quote:
Originally Posted by Mile Marker 42
Can someone please answer this: For preventive measures, couldn't a CAPS owner simply install a 12V pump near the tank, wire it to come on when key is in run position and push fuel towards lift pump without doing anything else? Is there a reason this can't be done?
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Search Fass fuel pump. Many post about this .
Apparently it will CORRECT the manufacturing defect.
__________________
05 Itasca Meridian 32'
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12-19-2020, 12:25 PM
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#372
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Senior Member
Join Date: Oct 2020
Posts: 588
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Quote:
Originally Posted by IMDiesel
Search Fass fuel pump. Many post about this .
Apparently it will CORRECT the manufacturing defect.
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FASS seems like expensive overkill. I don't know why you need to add new filter heads and return lines to a system that already has them. I tend to agree with MileMarkers theory that you could just install a high flow pump before the first filter. I'm not sure it needs to be close to the tank - it can generate just as much pull as it can push in a properly plumbed system.
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12-19-2020, 12:34 PM
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#373
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Senior Member
Join Date: May 2013
Location: S. California
Posts: 1,379
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Quote:
Originally Posted by Fffrank
FASS seems like expensive overkill. I don't know why you need to add new filter heads and return lines to a system that already has them. I tend to agree with MileMarkers theory that you could just install a high flow pump before the first filter. I'm not sure it needs to be close to the tank - it can generate just as much pull as it can push in a properly plumbed system.
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Yes, hoping to hear from someone who did this. Pump and wiring only.
__________________
2003 Monaco Knight 36ft PST Triple Slide- 315 ISC
2007 Jeep Grand Cherokee 3.0 Diesel 4x4
2- 2013 Yamaha VXR's 70MPH+. 2019 Sun Tracker 18ft Pontoon w/ 75hp Mercury
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12-19-2020, 12:37 PM
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#374
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Senior Member
Winnebago Owners Club Freightliner Owners Club RV Trip Wizard
Join Date: Nov 2018
Posts: 229
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Fass isn't the only pump. Their are others.
But the issue was that their needed to be a remote pump installed to assist the caps system as per the engine manufacture and the chassis manufacture dropped the ball. So it became the responsibility of the owner.
This is just my interpretation of what I read.
__________________
05 Itasca Meridian 32'
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12-19-2020, 12:51 PM
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#375
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Senior Member
Join Date: Sep 2010
Location: Bossier City,Louisiana
Posts: 657
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So you bled the fuel lines till fuel came out around the injector nuts and the engine still would not start ! If the pump was bad how did fuel get to the injectors ?
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12-19-2020, 01:19 PM
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#376
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Senior Member
Alpine Owners Club
Join Date: Oct 2019
Location: Hoodsport Wa
Posts: 3,131
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Quote:
Originally Posted by Fffrank
FASS seems like expensive overkill. I don't know why you need to add new filter heads and return lines to a system that already has them. I tend to agree with MileMarkers theory that you could just install a high flow pump before the first filter. I'm not sure it needs to be close to the tank - it can generate just as much pull as it can push in a properly plumbed system.
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If $649 sounds too expensive to repair a known fuel delivery problem on coaches with the ISC, perhaps RV ownership is not going to be for those that think that way...
I'm really sorry you just experienced a CAPS pump failure.
Fuel foaming and starvation is a known killer of CAPS pumps.
A positive fuel delivery system like FASS or AirDog eliminates that possibility, all for about the same DIY cost of a OEM primer pump.
If you ask me, positive fuel pressure, air separation and extra filtration is an absolute no brainer.
Fwiw, this is only my opinion...not trying to be brash.
But, 40 years in dealership and utility heavy fleet maintenance may have influenced that opinion just a bit.
__________________
2000 Alpine 36 FDS #74058
04 Jeep Wrangler TJ
"On the road to find out..."
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12-19-2020, 01:27 PM
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#377
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Senior Member
Join Date: Feb 2017
Location: Las Vegas, NV
Posts: 135
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Quote:
Originally Posted by Fffrank
FASS seems like expensive overkill. I don't know why you need to add new filter heads and return lines to a system that already has them. I tend to agree with MileMarkers theory that you could just install a high flow pump before the first filter. I'm not sure it needs to be close to the tank - it can generate just as much pull as it can push in a properly plumbed system.
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Wow! Dude, you are awesome! It is more TENACITY than having to “get it done”!
Even my Wife is on the edge of her seat rooting for you!
Bruce
__________________
2005 Kountry Star 3910 (Sold)
2015 Dutch Star 4018 (Sold)
2020 Dutch Star 4081 (Spartan) & 2022 Bronco WildTrak 4 Door
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12-19-2020, 01:28 PM
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#378
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Senior Member
Join Date: Apr 2019
Posts: 1,957
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Just read the entire thread, man what a trip! It seems to me that the main mistake made was not stopping at one of the independent garages, and allowing it to be towed to Cummings. Probably would have been back on the road within a few days. But we all live and learn. I hope OP gets it fixed soon and gets back on the road!
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