Community Forums

**CountryFit** · 12-02-2022, 11:13 AM

Just thought to throw a reminder to CC folks here with an older Cummins CAPS engine - pay attention to your fuel system! My recent experience wasn‘t pretty (had a thread in Cummins forum here). After replaced the lift pump and fixed the air leak, I drove 100 miles yesterday, it was smooth, engine appeared putting out more power.

FASS or Air Dog, is a good way to go; about $700, worth the money. Our own Don (dons2346) and Jim (jacwjames) know it inside out

. Ask them queations if you are going that route (big shout out to them!).

Bottom line - you never want to see your CAPS pump shot - big bucks!!

Happy travels!

dons2346 · 12-02-2022, 01:23 PM

Good to hear you are back on the road.

**CountryFit** · 12-02-2022, 04:50 PM

Yep! Feeling sweet when it's purring

bizzerbiz · 12-02-2022, 06:08 PM

Bought my 2002 Monaco Windsor in March and installed an Air Dog system last month. This was completely pro active after reading post like yours and decided not to be a "pay me now or pay me later" casualtie. Glad all is well Country Fit!

Oilbrnr · 12-02-2022, 07:08 PM

I received my AirDog a couple of weeks ago, and it will be installed before our next trip in Jan.

My son will be home from school for xmas break and I’m going to co-opt his welding skills to modify the existing bracket for the SINGLE fuel filter on my lowly Inspire, to hold the new pump/filter assembly.

I’ll post up pics. AirDog wants pics too! ;-)

**CountryFit** · 12-03-2022, 06:24 PM

Quote:

Originally Posted by bizzerbiz

Bought my 2002 Monaco Windsor in March and installed an Air Dog system last month. This was completely pro active after reading post like yours and decided not to be a "pay me now or pay me later" casualtie. Glad all is well Country Fit!

I like the "pro-active" approach in term of CAPS. On Cummins forum, there had been cases of lift pump failure leading to CAPS to be changed. Recently there were two such cases, one of these the initial diagnosis was ECM failure, big money for that repair, but that didnt fix the problem eventually the CAPS.

**CountryFit** · 12-03-2022, 07:02 PM

Quote:

Originally Posted by Oilbrnr

I received my AirDog a couple of weeks ago, and it will be installed before our next trip in Jan.

My son will be home from school for xmas break and I’m going to co-opt his welding skills to modify the existing bracket for the SINGLE fuel filter on my lowly Inspire, to hold the new pump/filter assembly.

I’ll post up pics. AirDog wants pics too! ;-)

Yep, love the photos, make them worth multi thousand words

.

dons2346 · 12-03-2022, 08:09 PM

Steve, is the Cummins forum on fakebook? I'd like to take a look but not if it is fakebook

**CountryFit** · 12-03-2022, 08:21 PM

Quote:

Originally Posted by dons2346

Steve, is the Cummins forum on fakebook? I'd like to take a look but not if it is fakebook

I was referring to Cummins forum on irv2

. There are a lot Cummins groups on fb, I am not in any of them.

**CountryFit** · 12-03-2022, 08:29 PM

These are worth reading:

https://www.irv2.com/forums/f123/hel...ue-596367.html

https://www.irv2.com/forums/f115/no-...un-600023.html

This guy fixed the leaky lift pump, then replaced CAPS pump and ECM... Finally nailed it (unseated harness):
https://www.irv2.com/forums/f115/new...-a-598484.html

Smitty77 · 12-03-2022, 10:37 PM

CountryFit - Glad you have, and helping others, solved this one! I'm in agreement on augmenting Lift Pumps!

I'm now a bit removed from CAPS support, from when we had our 04 Allure, with ISL370 CAPS - fed via Lift Pump, engine. We were a relatively early adopter to adding the FASS to our Allure. With super support from Brazels'rv, and specifically back then - Alan Sanders.

Positive post on your part - to help other's. Salute!
Smitty

**CountryFit** · 12-04-2022, 09:21 AM

Thanks Smitty for chiming in. I remember many years ago you talked about FASS. At the time I didn‘t fully understand how CAPS works and the potential consequences if it ever failed; I wish I did. Through my recent fiasco, though not the worest, I truly believe it‘s a must for owning those engines for ones wanting to have a peace in mind on the road and sleep better at night.

Best wishes on your travels and happy holidays!

Smitty77 · 12-04-2022, 12:08 PM

Since this CAPS related... I'll also toss in the importance of Lubricity... The CAPS is both Cooled and Lubricated via the Fuel Flowing thru to the Injectors. I always added OptiLube to each fill-up (Still do, in the ISX600 too

! Plus a dash of Cetane too for the ISX.).

Admittedly the Bio-Fuel's, of which at most fill up's are at least 5% (Though they do not need to state so. And sure, some states have 100% ULSD Fuel available.), and the Bio part does add Lubricity to the fuel.

CAPS can be expensive (As noted in the linked threads!), and a Gallon of OptiLube Summer Blend, just about covers a full year of our travels - so relatively cheap insurance, adding some to each tank.

Best to all,
Smitty

Jthigh · 12-04-2022, 12:22 PM

I need to look at a FASS or AirDog as well. It is my understanding that I need to run a fuel return line to the tank. My concern is how is the best way to do that? Have you found unused ports on the tank to hook up a return line?