Hi, can you please let me know what can cause fuel pressure relief valve code to set on after washing engine . It only happens after wahing engine. AND everything goes back to normal after day or two. Truck sets derate and goes to restrictions turbo boost.

I've been waiting a while for u to do s video on the exhaust pressure sensor!!! Thanks Joe keep the content coming👌👌👌👌👍👍👍

Love your video's Joe, Very informative Thanks

I get miss fires when the tube gets stopped up

I have volvo 2019 d13 my fuel filter water separator is keep clogged and getting dark in one or two miles after replacing new one I have changed 14 times in last two weeks losing power and after 1 hours power coming back any idea

Thanks for video actually that’s a good tip

This shit is not connecting

Was there a recall on certain systems? I have a 2013 diesel pusher motorhome and now have code SPN 3031 FMI 2 OC 1

Where is it located on the engine ?

Is there a test port at this block ? Idle pressure ? Full throttle pressure ? Read on scanner ? Full air to valve or regulated ? Thank You , Diesel Joe !

When removing to fix the gasket behind it does it matter how to gear is re installed. If the system is timed?

I have the 2019 I s x 15 2350. I want to be able to ramp up my idle for long intervals of idoling, but my truck does not have that feature as far as I know. Can you tell me if that is possible to add that through the cummins insight or some other method?

2019 jake brake issues. Cummins replace the wiring hernis to the Jake's and injectors. No fix, add another shop, replace Illinois. They found a crimp o-ring on the solinoid. No fix basically. I'm having symptoms of weak Jake break where I need high RPM to have my jake's working properly in. Sometimes they just get weak, but if I'm at low RPM they most. Almost certainly get weak with a terrible. What seems to be engine vibration? When the jakes aren't working properly, please help.

Can this cause problems with the egr fault 1866 Delta p sensor

There is a great tool in insite for this. The data link tool in the tools tab has the ability to seperate can signals and allows you to observe them individually. The problem is Cummins only allows engineers to have access to it. I despise oem hoarding things like this.

Faster to just scope the can lines at the Cecu and find out what leg of the bus is faulting. Then start unplugging modules. I do like this kit it would come in handy if you didn’t have a scope.

I’ve been getting this code intermittently for 2 years on my 2013 isx cm2350. I have Insite and monitor the said metrics. My diff pressure is never above 1.9 and a steady regen every 100 hrs. Oil analysis shows zero issues. This has always been a head scratcher. Mine is in the #3 cylinder. I treat every tank w fuel catalyst and Lucas fuel treatment. I’d love to get your thoughts. Engine runs great. Love your channel and appreciate your insight. I didn’t want to change injector for the sake of change.

you the man joe mama

Great video Joe! As life goes, been super busy so haven't been able keep up with videos lately. Interesting case study that followed solid knowledge, experience, and followed the data. Correct me if I'm wrong, but didn't these codes come out when Cummins went from injector trim codes to adaptive trim function. While they never spell out the entire details, my understanding was that each individual injector software model could be adapted to account for wear and drift that occurs over time. The strategy was when the engine was in a motoring event (zero fueling), the injectors could be pulsed slightly and monitor things like crankshaft speed/acceleration, NOx/O2 readings, exhaust pressure in manifold etc so ECM could calculate injector pulse width/current ramping vs actual fuel rate and amount delivered and apply compensation to the model. If the compensation exceeds a certain threshold, then a mechanical issue with the injector is assumed and sets appropriate fault code. I know the Delphi stuff I deal with does the same, but pretty sure it also monitors rail pressure drops as injector is commanded on to add an additional check. I have seen some people just reset these code in advanced ECM if it hard coded active and went on with life and I know of other occurrences with the ISL that they only way to able to clear the code was ECM replacement. Nice to see yours was truly a malfunctioning injector. As far as lift goes in this modern injectors, the ones I deal with latest generation of injector the control valve lift went from 4 micron to 1 micron (0.00004")! Trouble is mid western biofuel is leaving more or less a sodium soap residue on the armature plate causing misfires. Sometimes hard to strike the balance with modern emissions and OBD requirements. Thanks again. Steve

Now It sounds nice like it’s supposed to. Thank you Sir

Would that problem throw a code?

Can them Pressure sensor tell the lift pump not to work what tells the lift pump to run wen the key is turned on

That’s really good to be able to use the engine hours to help determine the issue. I never thought of that . Thanks for teaching us Joe.

Great break down, thanks for that. I've come across this same type of fault code on large Cat off-highway engines. In those cases the engines were pre-emissions (Like tier1/tier2) so very little in the way of temp/diff press sensors to go off of. The owner (typically a mining company) wouldn't want to change out injectors as long as EGT's were in check and it would pass a fuel system verification test after clearing the code. Not ideal, but that's mining. I was not the dealer in any of these instances so I couldn't push any repairs even if I wanted too. Haha

Fantastic break down. This was like solving a cold case file. The regen history trick is awesome.

Can regen hours be programmed? Mine regens every 36 hours 100 hours would be nice save a lot of fuel

What is your opinion about the aftermarket intake some of these so called performance shops sell they claim it helps # 6 breathe better most of my experience with these aftermarket products is they are nothing more than a gimmick what are your thoughts

Diesel Joe , would you recommend a Panasonic Toughbook with Cummins Insight , what do you use ? I would like to enter DD , Volvo / Mack and Caterpillar . As always, Great Information ! Thank You !

Worked for a large construction company, a major equipment manufacturer and Mack trucks factory branch. I would have never spent that kind of money on a Detroit. Glad you found the issue!

Once it warmed up not a whole lot of smoke either that engine is running perfect

On my isk15 sometimes on a driving regen it will smoke the first 40 minutes then stops. It doesn’t do it all the time when regen when driving

Thanks for the information

Exhaust stack is bent that's the problem 😜

Trucks are supposed to roll black smoke DELETE IT!!!

Nice follow the system sucks about the parts

Great job figuring that out.

I appreciate how you solved the issue and show your business stands behind their work..many times even the best efforts are stymied because in a manufacturing mistake…we’ll done

Unfortunately such is life for most service trucks. If buying used I would always favour a truck with low miles but high hours. You can always swing an engine. Keeping a mile’d out truck reliable is another story

Excellent work!

What a nightmare and you got it from Cummins?

Great diagnosis! 👍

Hi, I got code 553 code 3741 and 4841 . Engine is x15 2022 peterbilt. It happened after I wash the motor . Please tell me what to look for . Thanks

Glad you found it, that's a really unusual issue. Everyone knows the aftermarket is full of defective new parts but you dont see it as much with oem stuff.

Thank You Good Tech You Do !

Almost everything you buy nowadays is junk, the only way this will stop is to make the manufacturer start paying for labor, and watch how quality control goes up.

Loved it.👏👏👏

I’m having problems the same. Fuel filled all the way to the top of the glass. Makeing the truck jump when going up grade. Twice I have a pm done filter has been replaced one month now gone I’m having the same problem

Cummins quality has gone to hell the last few years no such thing as quality parts any more

Cause it’s junk? Cummins is a piece of junk.

I purchased parts from local authorized cummins dealer like a oil pump because i did not want a ebay china one payed double the price of ebay open box at home bottom of pump said made in china cummins was good back in 80/1990s but i question the engines/ parts now