Proper Troubleshooting - Proper Pressure

[@hddm3]

Glad to see you post again

[@TheDieseler]

Thanks a lot! Hope the videos are helpful for you.

[@dieselfixr]

Great video. Question where do you source your def connections? The gauge and pipe are all general have a harder time finding the def fittings. Thanks.

[@TheDieseler]

It's been a while so I'm not 100% certain but these may have come from unused inlet fittings from Detroit's "RS Supply Kit". Or possibly removed from old pumps. I also seem to remember that the fittings are not pipe thread and did not thread into that T-Fitting very well. With lots of sealant and a nice tight cross threading though, they're holding well!

[@rickl7024]

Good video,, thanks!

[@meerimzhanybekkyzy5455]

Hi, thanks for the great video. I have 4334 fmi 18 code on my dashboard. What would be your recommendations?

[@mrp4837]

A manual pressure tester is a very good idea to confirm if the internal sensor is at fault or not.

[@alliancemediagroup]

I have code 4334 7 I replaced pump metering unit and plu idk what else could be the problem other than one of the reman parts being no good any idea what else I should check I did everything in all your videos

[@daytondayton2411]

I have a leak on the vent (those two grey dots on top black box on front) right side… any info on how to fix that?

[@AbanobbG]

Have you ever had a Spm 4334 Fmi 4, Def low pressure sensor circuit low? It's a DD15 and Detroit says check the electrical connection and if its good to replace the def dozer. I'd appreciate your thoughts on this.

[@TheDieseler]

Sounds like someone really wanted to sell you a Doser.. That is nowhere near Detroit's recommendations for that fault. (I'm assuming you're speaking of at least a 2013-2014/GHG14 engine if you're referring to it as a Doser.) There is no way I would shotgun a Doser at something after nothing but a quick look at a connector. 4334-4 is a circuit code (It even has the word "Circuit" in it's description). It's very unlikely that the pressure sensor is internally shorted within the Doser. 3 wires are involved with the operation of the pressure sensor. I'm willing to bet 1 of them is shorted to ground. If this is the only code you're dealing with, it's most likely the signal wire which is pin #8 in the 8-pin connector on the Doser (#5 is the 5V supply and #7 is the sensor ground). Re-watch from 2:07 to 2:23 in this video. There's a good chance you'll find your answer there. Good luck.

[@AmanAndHisTruck123]

I currently have 4364/17. 2019 cascadia What do you think is the problem ? I have dpf clean, both inlet and outlet nox sensor, do you think it’s the Def doser or Def injector ? Thank you

[@bahermohamed6027]

I have 2016 cascadia with Cummins engine and I have got 2 days ago a fault code SPN4334 Fmi 4, please advise

[@ghostbuilder3187]

Awesome video

[@vasiliy2394]

Where are you located? My code is 3574 on a X15 Cummins, what should I look for?

[@sroc2766]

Cummins has this problem with isl9 motors

[@TheDieseler]

I figured they would. I've also ran into a couple with low pressure issues recently.

[@feimohach]

Hey Will, where can we find you? How can I call you? Thanks

[@feimohach]

Hey buddy am still waiting for your answer

[@manuelfloressr.9039]

NOT useful for the average Joe that does NOT have the scanner nor the special gauge.

[@mariomazerati]

Then take it to a real mechanic 😂