2025+ Fuel Filter Housing Air Issue

[JPhillis]

I did the first part of this video: The part where he says to disconnect both Neg battery cables--wait 5 minutes--then reconnect the Neg battery cable on the passenger side---my 2025 did NOT make any noise of any kind---no "priming/humming" type noise under the hood. Doing this procedure did not change anything---wonder if this applies to ALL 2025's? This was supposed to make it crank faster--meaning less revolutions for the starter to turn in order for it to start. I have owned my 2025 for 6 months and have not noticed it taking any more revolutions to start than my previous 2017 Cummins..
Has anyone else performed this FIRST part of the video on your 2025? Did it make a difference in it starting?

No mine did the exact same thing, absolutely nothing, zero, zilch.. I just drove and it finally purged what air was there and the code finally cleared on its own and stored the code.. I went to the dealer last week and questioned this and they literally did 6 different software updates on various module's. One they claim and I say claim corrects this, I believe that as much as there is no snow outside but I can see 8 inches in front of my face.. Guess time will tell.

 

[mbarber84]

I went to the dealer last week and questioned this and they literally did 6 different software updates on various module's. One they claim and I say claim corrects this

The level of disconnect between the dealerships and Ram / Cummins engineering is astounding.

The left hand literally has no idea what the right hand is doing.

Simply astonishing. There’s no software update that will fix a mechanical / physical flaw with the filter housing. New parts are in the works. Stay frosty (which shouldn’t be too difficult to do given the recent weather)

 

[JPhillis]

The level of disconnect between the dealerships and Ram / Cummins engineering is astounding.

The left hand literally has no idea what the right hand is doing.

Simply astonishing. There’s no software update that will fix a mechanical / physical flaw with the filter housing. New parts are in the works. Stay frosty (which shouldn’t be too difficult to do given the recent weather)

Exactly, I work on everything from Cat 2.2 to C15's, Deere 4.5 to 13.5 and the industrial ISB6.7's, never in my life have I heard more BS that that... Need FASS to hurry up and make a filter system for the 25 and up 6.7's.. Software updates make the air vanish out of the system...

 

[mbarber84]

Exactly, I work on everything from Cat 2.2 to C15's, Deere 4.5 to 13.5 and the industrial ISB6.7's, never in my life have I heard more BS that that... Need FASS to hurry up and make a filter system for the 25 and up 6.7's.. Software updates make the air vanish out of the system...

Wouldn’t recommend a FASS on these trucks unless you’re so heavily modified the factory lift pump can’t handle the fuel demand. (2025+ lift pumps move more fuel than previous 2024 and older trucks)

Water-absorbing fuel filters are a no-go on any vehicle, and their continued reference to micron ratings that aren’t physically possible by current ISO 4406 12/9/6 fuel filtration metrics is more than sufficient to turn me away. Yet another example of an aftermarket company creating a problem phenomenon so they can sell a substantially priced “fix”. The stock fuel system on these trucks is more than adequate for fuel delivery even in mildly upgrade engines, and is significantly better at filtering out particulate / removing water. Save your $$ and use it for an upgrade that actually provides a benefit.

 

[JPhillis]

Yes I completely agree to a point with the micron rating to a point, all of the engine manufactures we use claim 500 hour service intervals for fuel filter and oil change intervals. What i see on a daily basis is none and mean none make it past the 200 to 250 hour mark.. Customers are always upset their **** wont run because the filter are to restricted to flow fuel. I believe this is why we no longer see low rail pressure codes anymore in the industrial world, **** just bogs and falls on its face or just flat wont run... Would anyone here go 30,000 miles on fuel filters and oil and filter changes.. I sure would hope not. As for the water part correct, water does not atomize, with the pressures we are running at the injector 26K tier 3 to now well over 30K Tier 4F 1 droplet of water will literally blow the tips off of injectors.. Warranty does not cover that...

 

[mbarber84]

Yes I completely agree to a point with the micron rating to a point, all of the engine manufactures we use claim 500 hour service intervals for fuel filter and oil change intervals. What i see on a daily basis is none and mean none make it past the 200 to 250 hour mark.. Customers are always upset their **** wont run because the filter are to restricted to flow fuel. I believe this is why we no longer see low rail pressure codes anymore in the industrial world, **** just bogs and falls on its face or just flat wont run... Would anyone here go 30,000 miles on fuel filters and oil and filter changes.. I sure would hope not. As for the water part correct, water does not atomize, with the pressures we are running at the injector 26K tier 3 to now well over 30K Tier 4F 1 droplet of water will literally blow the tips off of injectors.. Warranty does not cover that...

Current factory filters are rated for 15,000 mile intervals and have a built in system that will alert the driver to change them earlier if the system detects a drop in fuel delivery. Fuel filters work better as they gain hours of operation and collect debris. No reason to change them earlier unless the system is telling you to. You won’t find a better OEM fuel system on any truck out there. The Ram’s have had the competition completely blown out of the water since 2013.

These trucks are very capable of achieving 15,000 mile oil change intervals with proper drive cycles, good maintenance, and good oil. We left 1950’s oil formulation and engine building behind several decades ago.

 

[JPhillis]

Current factory filters are rated for 15,000 mile intervals and have a built in system that will alert the driver to change them earlier if the system detects a drop in fuel delivery. Fuel filters work better as they gain hours of operation and collect debris. No reason to change them earlier unless the system is telling you to. You won’t find a better OEM fuel system on any truck out there. The Ram’s have had the competition completely blown out of the water since 2013.

These trucks are very capable of achieving 15,000 mile oil change intervals with proper drive cycles, good maintenance, and good oil. We left 1950’s oil formulation and engine building behind several decades ago.

I always use Fleetguard filters, not paying premium 50% more because it says Mopar on them for sure, they better correct this quickly air in the HP pumps is not good.. Time will tell how the new CP8X HP pumps will hold up. Now yes oils have come a long way yes, but with the roller lifters used in these engines I will change every 5K.. It is like Cummins does not like Ram for what ever reason, the ISB 6.7 in the industrial world I know and to my knowledge in bigger truck market, school busses and dump trucks still run flat tappets

 

[mbarber84]

I always use Fleetguard filters, not paying premium 50% more because it says Mopar on them for sure, they better correct this quickly air in the HP pumps is not good.. Time will tell how the new CP8X HP pumps will hold up. Now yes oils have come a long way yes, but with the roller lifters used in these engines I will change every 5K.. It is like Cummins does not like Ram for what ever reason, the ISB 6.7 in the industrial world I know and to my knowledge in bigger truck market, school busses and dump trucks still run flat tappets

CP-8 is extremely stout compared to its CP-4 predecessor. Shouldn’t be any issue with those long term. The way they beefed it up is pretty substantial.

Commercial B6.7’s are still flat tappet and will be that way until replaced by the 7.2L DOHC engine next year.

You can tank Stellantis for the hydraulic lifters. That was their call. They wanted to reduce NVH / valvetrain noise. The lifters fail due to poor quality control at the sub-assembly manufacturers that produce them for Cummins. It isn’t, and never has been, a lubrication failure related issue. Please not caveat would be if someone used 15w-40 in extremely cold climates repeatedly. Generally speaking, that’s not a widespread problem.

 

[Nick]

That bit of wisdom to pour fuel directly into the filter is really bad . You are going to have unfiltered fuel going directly into the system which in my opinion is not good . If you have to do this use cheese cloth or something along those lines to keep any contamination out . My 15 literCummins motors had purge valves in the event of an air problem . You wonder if they ever tested this system .

 

[mbarber84]

That bit of wisdom to pour fuel directly into the filter is really bad . You are going to have unfiltered fuel going directly into the system which in my opinion is not good . If you have to do this use cheese cloth or something along those lines to keep any contamination out . My 15 literCummins motors had purge valves in the event of an air problem . You wonder if they ever tested this system .

I’m not a fan of that recommendation either, however, in theory it shouldn’t be a huge concern because the filters should be installed and fully seated before any fuel is added. Since the system filters from the outside of the filter to the inside, the fuel passing through and to the HPFP is still getting filtered.

Thousands upon thousands of road miles logged by test mules long before official release. Not sure how all of these issues made it passed that testing and shakedown process.

 

[Jmonty]

Thousands upon thousands of road miles logged by test mules long before official release. Not sure how all of these issues made it passed that testing and shakedown process.

Thats the concerning part, how did they not catch this during that testing they should have needed to change the filters on those test rigs :| What else didn't they catch.

 

[mbarber84]

What else didn't they catch.

A myriad of electrical gremlins with the new “Atlantis” CAN electrical architecture.

Wheel speed sensors that are flawed.

A DEF level and pump unit that is flawed.

Glow plugs that are shorting out.

The CP-8 HPFP making unknown noises the source of which is as yet unidentified.

I could go on and on. The truck has only been out on the public for two model years and the 2025’a already have 185 manufacturer communications documents uploaded through the NHTSA portal.
These trucks should have been the Hail Mary that brought them back to the top of the HD truck market, but they look more and more like a fumble at the one yard line every day that passes. And they still haven’t released anything on the intermittent ticking that’s been a problem since 2019-2024 trucks.

 

[Jmonty]

I'll admit I don't read every forum post but there are a couple there I hadn't heard about yet nor had I seen they are up to 185 communications documents already. Sheesh.

 

[WXman]

My goodness. The more videos I watch, and the more I read through this section of the forum, the better that 6.4 Hemi is looking.

 

[MacksRam]

My goodness. The more videos I watch, and the more I read through this section of the forum, the better that 6.4 Hemi is looking.

WXman,
I can see how a person would think a Hemi might be better...
But let me add here:
I can't help but think IF a person REALLY follows these 8 steps closely---PLUS they temporarily remove all 4 battery cables BEFORE you Start the procedure---so there is nothing to cause the lift pump to turn on/pump fuel (i.e. opening and closing truck door, etc).
I don't think you will have any issues.
(Yes step #2 will not be easy but is doable--plus the fuel will be going on the "outside" of the filter--hence that fuel will get filtered.)
My truck has 9000 miles---I will be doing this procedure soon and will let you know.

 

[Units]

I considered trading out of my ‘23 at one point, on my way down the internet rabbit hole. Glad I didn’t, just sayin.

 

[HarryN]

My goodness. The more videos I watch, and the more I read through this section of the forum, the better that 6.4 Hemi is looking.

AFAIK, the hemi version of the truck uses the same electronics as the diesel, so it is not obvious that you would gain from one vs the other in that area.

The real issue is that the canbus that RAM chose is too slow compared to the network needs.

 

[NDanecker]

Additionally the Ram 1500 went through similar growing pains and electrical issues when it implemented the new Atlantis architurure. So far things have gotten significatnly better with those so I wouldn't be too concerned.