Accumulator

[shootist]

Originally Posted by CampoutWill

I checked the fuses and all were fine. All I have left to check is the ecm harness to see if it got loose, crazy thing is the coach was running so sweet on the way up to South Carolina smooth as ever I don't have a clue what this is . I changed my fuel filters last year they have maybe 3,000 miles on them at most. I searched if smoke is possible with clogged filters and came up as no? Would it smoke if the filters are clogged?

Will

3000 miles is 6 fuel stops or so. You easily could have picked up water or have algae growing. White smoke is unburnt diesel. Black is an incomplete burn.

[jacwjames]

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What Shootist said.


Could have easily picked up a bad batch of fuel.


FWIW, I travel with 2 extra filters of each of the type I use & the tools to change them.


The fact that it starts and idles smooth is good but on a pull the demand for fuel is higher.

[CampoutWill]

The code that keeps popping up is 0456 popped up 81 times and won't clear the 0434 popped up 9 times. Could the low voltage from the bad batteries damaged the accumulator?

[CampoutWill]

I'll do that this weekend change both filters and see . I really appreciate all the responses guys thanks a lot!

Will

[jacwjames]

I had a similar code pop on my Silverleaf back in 2021, only one time though. Engine was idleing while I was fueling up and the engine stumbled but recovered. Never had it happen again. Note that I have a FASS transfer pump system that pumps 100 gph continuoulsy and delivers fuel to the injector pump. I abandoned the original transfer pump.


Below was searched for using my SN, so it may be different then yours.





So attached is the information on off Quickserve on the 0456, I did a fault code lookup and got all this info. and then saved a copy of the injector pump with part number and the part number list. The first document indicates it may be your pressure fuel sensor, which is a replaceable part. I have heard/read of people replacing this.

[jacwjames]

Couldn't fit all the attachments on the previous post, here's the last.


The original part you need is 4984579 But the technical service bulletin shows they've added a bracket. You will have to source the correct part, I did a quick check and it is available.



All this info was on the quickservce site, took me ~10 minutes to pull it up, save it to file and then respond. I'd suggest you create an account, it is one of the best resources for a Cummins owner.

[CampoutWill]

Problem solved clogged filters, I can't believe it! Primary filter had a green tint to it. The only experience that I ever had with bad or clogged filters was when I first bought the rv in 2019.

I was driving it down from Orlando and I started to feel small hesitations and dash lit up "wtr in filter" since it was new to me I did a full tune up and had all fluids changed.

I've also been changing out my filters once or twice a year putting very few miles on them and every time I changed they were extremely clean.

What really confused me on my trip home was that I the transmission was driving in limp mode because my batteries were dead (I didn't know they were dead) and at the same time the engine was shuttering on acceleration.

It got so bad on the way home sometimes it wasn't able to get up to 45mph . So today around 11am I changed the filters filled up the tank and drove it on the express way with no issues whatsoever. It climbed to 75mph easily and ran beautifully.

I can't thank you guys enough. I would of paid that truck shop $2,500 for nothing. Again I really appreciate you guys giving me all those responses, their are some really good people on this site.

Will

[CampoutWill]

One last question what filter brands do you recommend? I have been buying my filters at Napa and they seem to be to pricey to me. I paid $ 134 dollars for the primary and secondary filter is that reasonable? I saw some brands online with multi packs but not sure what brands to avoid?

Will

[jacwjames]

I stick with the Cummins Fleetguard filters. I do search the internet for the best prices and usually by 2 or 3 at a time for each


Suggest you look into some fuel treatment. I use Biobor when I part the rig for a while, always park with a full tank. Will also use Startron enzyme treatment which breaks the dead algae down. Will also usually treat the fuel during the year a couple times if on a longer trip. Never know when you might get a dowse of algae.

I also started using Optilube, my ISC needs the extra lubricity.

[shootist]

Originally Posted by CampoutWill

One last question what filter brands do you recommend? I have been buying my filters at Napa and they seem to be to pricey to me. I paid $ 134 dollars for the primary and secondary filter is that reasonable? I saw some brands online with multi packs but not sure what brands to avoid?

Will

Those are really really high prices. I am in total step with jacwjames.

[2004Horizon]

* Whenever your CAPS-engine hesitates it is because it is being starved of fuel.

* The CAPS injector only gets starved of fuel for 3 reasons:

1) Algae, which you will see green or black chunks in your fuel filter sight bowl; or...

2) You are sucking air into the fuel delivery line... usually at the lift pump gasket... and not due to a failed lift pump itself.

3) You are using smaller than a 10-micron filter in your CAPS system and that is adding fuel restriction to you system. (Cummins recommends 20-micron primary and no smaller than 10-micron for your secondary fuel filter.)

REGARDING FREQUENT FUEL FILTER CHANGES


* If you find you are fixing your engine no-start or no-run condition by changing fuel filters, this is NOT a solution to your fuel delivery problem. Sure it works, but you are missing what your engine is telling you. Here's the truth:

* You are probably sucking air through the lift pump gasket.

This is why OAT cold temperature will play a role in starting your engine; and then everything will be ok when OAT is above 50F. This can go on for years until one day it never gets above 50F OAT and your engine may start but to die 1 minute later.

* There is no such thing as "bad fuel." This is what people convince themselves of when changing the fuel filters solves their CAPs engine start or run problems. When in fact, a partially clogged fuel filter is just adding more restriction to the suction fuel line; and that boarderline condition is the difference between starting an engine and engine hesitation when climbing a steep grade.

SOLUTION: You should bypass your electric CAPS lift pump and install a FASS or AirDog. And you should do it before you CAPs injection pump fails due to friction from fuel starvation!

Electrically: Yes, like Skip426 said, your " transient suppressor " can fail, but I would add you can replace your Stator too for cheap. And the Accumulator can get clogged by Algae.

I recommend you use a BioBor Biocide (you can buy on Amazon) to kill all the algae in your tank, and install a FASS fuel pump to provide positive fuel pressure to your CAPs injection pump. And then after you install a FASS you can use small micron fuel filters. (See attached irv2 owners diagram on what a FASS fuel system looks like.)

Note: Algae can accumulate to over 1/4" thick over time! And if you keep your algae in check, then you accumulator should not fail.

[Surf Fisher]

Whenever your engine starts to stumble ALWAYS change the fuel filters FIRST. That is the cheapest first approach to troubleshooting a potential problem. Doesn't matter how many miles you have on them, one bad tank of fuel can mess up a set of brand new filters you may have just installed the day before.

Plus always carry one set of new filters with you. You will have them ready no matter where you may be as filters may not always be readily available.

I run a mixture f diesel Kleen mixed with a maintenance portion of Biobor JF. I usually put a dose in every other fuel up. Plus I always use a dose when I fuel up just before parking for the duration such as where I am now until mid-October and I do it again once we get back to Florida for the winter.

The Biobor JF will take care of any microbes that may have gotten in with the fuel especially at stations that don't have a high turnover of fuel.

That's one reason why I try to use truck stops to fuel up every time. Their fuel is usually fresher than car stations.

Glad it was a simple fix!

[erhaddix]

If it is bucking, replace the primary (first) fuel filter.

[jacwjames]

From the movie McClintock, Drago says "People People People"


He changed his filters and it solved the problem and saved him a lot of $$$$$