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Have you considered using a volumetric sensor? They sell for about 60 bucks for metering fuel on farms. You could pretty easily set the fuel to specific values and see what the flow in is, then measure the return out flow, subtract them and get a real measured result. I'd be super curious what the results where

I started a slack channel for cummins dev stuff, currently i'm the only one in it. If y'all would like to join it's a great place to have async conversations about this stuff and share code, links, and files etc. Just send me a PM with your email and I'll toss you an invite. that being said, I have a 2001 cummins sitting on my shop floor with a bad VP44. It's also got 18 cracked valve seats, and wasn't firing on at least one cylinder. But I'm super motivated to get it hooked up to a radiator and plumb the exhaust outside so I can use it as a test bench. I really want to dig into the decoder code for the cam sensor and see what I can do to wrap it up into a pretty class with a bow tie. I have the idea of using a laser distance finder like they use in the new laser tape measures and measuring the actual position of the piston and compare it to the output of the sensor decoder(can't do this while it's running obviously lol). I want to start working on a common rail ECU at some point, and that will be SUPER important to make it run right. It will requires uS timing and knowing exactly when to start injections for timing etc. So I figure this VP44 controller is a great place to start on the code that will be common between the two and it will just be fun on top of it.

I'd love to pitch in where I can. I'm full speed ahead on a VGT controller until I have it at least working enough to pull my RV. In the process I'm working on a number of things that are applicable to both the ECU and vp44 controller. I've done up a very robust canbus circuit with Uber circuit protection. Today I'm going to start on reading a 10 bar psia sensor and a 5 bar to get in and out pressure on my primary turbo. I'll be using an STM32H7VIT6 MCU at 480mhz with a dual precision FPU. I'll share my work later today. It's all in easyeda so it's super easy to see with a link, and super easy to order pcbs from jlcpcb. I'm tracking my progress in a spreadsheet. My goal is to use only readily available quality sensors. I really like the AEM sensors that use Deutsch plugs. I feel like I'm just ranting now 😂

Funny you post this. I am having a hell of a time with the actuator on my DPS turbonator! I found replacements from China, ordered two. One has already died. Now it goes into limp mode every time I hit about 35psi because the actuator draws too many amps. Long story short, I'm diving head first into making my own controller with a hella actuator...

I'm powering it with a Hardwire PDM, so I can monitor the amp draw in real time and log it. It's pretty sweet. I guess I'll have to install my known good blue chip pump and see what it does. My truck is smoking like a damn campfire gone wrong and won't build more than 23psi of boost so something is certainly not right. Could be a bad injector too, I'm using ones that came with an engine I bought that I never got to hear run. Man I'm looking forward to getting my new engine assembled and installed... It will have brand new 7x009 injectors from PDD and fire ring etc

Has anyone ever measured the amp draw of a VP44? I have been having some weird issues with one I just bought, so I did some logging and what I'm seeing is that it pulls about .2amps when it is idling smooth, then it jumps up to between 12 and 18 amps and the engine starts to run rougher, then it drops back to .2 and smooths out again. I'm curious if that is normal or the sign of a bad pump. Luckily I have a Blue Chip VP44 that works great, and I'm building a brand new ultimate bullet proof engine, so if this one is bad its not the end of the world...

I can hook you up with all the logs you need! There a guy that has already done all the CCD work, just need the hardware and should be pretty straight forward. I'll see if I can include the hardware in my PCM design or something. Now that I understand that the vp44 just speaks J1939 it is a lot easier to figure stuff out BUT, the messages between the vp44 and ECU are custom Cummins PGN's not part of the standard from what I can tell.

Heya mate, love seeing your progress! I can't wait to see this in person someday! I'm still working on my custom PCM, you motivated me awhile back to dig into PCB design and I've on iteration 4 now. I've learned so much! Maybe someday I can hook my PCM up to your vp44 driver :)

Those should do the trick! If it were me I'd make them parallel to the heater core coolant hoses, but fuel should work too so long as you have a hard kill on lack of fuel pressure etc. Really I think the stock one would be fine if they had better error handling around that. Food for thought!

Man, this is such amazing work! With a little bit of hardware hardening I think you might be on to something here! Maybe cool the electronics with coolant? Something that doesn't rely on fuel to cool and is more dependable and bam, amazingness

I'm pretty stoked to see the youtube video someday Following this like a hawk haha. I'm hoping to have my custom PCM done this month, then I'll need another project. I'm thinking transmission control next for me. But man someday I hope to use your work here. Keep it up mate.

@Great work! How close are you to a functional PSG? After I finish up my PCM I kinda wanna tackle a custom ECU next...