2nd Generation Dodge 24 Valve Powertrain

I decided to open source my stand alone VP44 electronics project. I started a github repository. It's far from a bolt on replacement. It's just a prototype but it has been running reliably for a couple of years now. Unfortunately, it's not a project for beginners and requires good soldering experience and there is one surface mount part on the board. The circuits have some high energy parts and requires some testing before operating. The software is not simple and has time critical routines. An in depth understanding of the MCU internal peripherals (timers, PWM) is also required. Any mistakes in assembly or coding can cause permanent damage to th…

Guys I am at a loss. I HOPE someone can help me, this is frustrating. Bought my first 24v Cummins, it’s an 01, 3500 dually, and 5 speed nv4500. She fires up beautifully, idles normally. Then it gots warm and it idles up, stays around 1500rpm or so. The tachometer isn’t working, I tried replacing the camshaft position sensor and it didn’t fix the tachometer, maybe communication issue? Does the CPS have anything to do with idle? OBD2 computer says idling at 1500rpm. The APPS sensor was replaced, and voltage set. Stays below 0.50 volts, around .44-.48. According to the sensors live data reading, the volta…

Hey folks, been lingering around this forum for years. Best site for reliable info. My truck: 2000 24V with 262K, Edge Comp Box(VP44 is Tapped), Airdog 150 Lift Pump, 4" Exhaust, S&B CAI, ATS 48RE(Don't Ask lol) Upgrade parts in question: HE351CW and DAP VCO 7x0.009 Injectors. All on 265X75r16 tires. Recently l purchased a used HE351CW off the marketplace for $50. It was in bad shape, I opted for a Spoologic billet cartridge instead of rebuilding. Along with the turbo, I purchased DAP VCO 7x.009 injectors to spin it. Project went smooth besides the dozens of boost leaks giving me hell. Countless hours later, with all the boost leaks resolved…

I'm working on a home made ECM for my truck to go along with my VP44 project. I almost found an ECM today on a burned up truck but the wiring was burned all the way to the ECM so i figured it was toast. The guy wouldn't sell it, I would have to buy the motor and he said the VP44 was bad with hot start issues. He had a V10 (blown) dually that he was going to put the cummins in. He wanted me to buy both. If he had a manual tranny in the deal I would have took it. But I skipped it. The usual diagram that many of us use has some errors in the pin names and functions. From all my VP research I know many of the details of these pin functions and thought…

Started her up after about a month of it not running this past July. Drove her across town maybe 10 minutes to the store. when i came back to the parking lot and turned the key i get a single click from the starter solenoid. I hastily buy two new batteries as it was a friday evening nearing closing time for the auto parts store. replaced the batteries and still got the single click at the starter, i decide to give the starter motor couple bangs to see if it helps but no luck. As it got dark out, i called a tow and got her home, when the tow pulled up to the house i rolled her off the flat bed in 2nd gear and she started right up. i didnt get around to working on the probl…

Looking for some help with diagnosing why the tach and oil pressure gauge aren’t getting signal. Gauges have been tested and work fine. I’ve installed a mechanical oil pressure gauge and it shows good pressure. I have RPM’s within range. Was a good running & driving pickup but had a cracked 53 block. I had a mechanic build me a new engine. He used a 2004 5.9 common rail block with my original VP head. Long story short he went out of business and I ended up getting the truck back unfinished. I installed the factory cam and cam gear and gear case and mounted the factory reluctor ring in front of the balancer. Multiple ecm’s and pcm’s later I finally have the engine star…

So, a little back story first. About 2 weeks ago the wife and I went to the store. After finishing shopping, walking to the truck I noticed something under the truck. It was the fuel tank. Luckily not fully on the ground. The rear tank strap broke. I knew it was rusted but didn't know I was that close to a big problem. I grabbed a couple rachet straps from the tool box and strapped it up just to get home. One home I reattached the filler neck and vent hoses and proceeded to strap it up with a 2 inch strap to hold it in place while waiting on parts. I have to give a shout out to @Genos Garage! They had the straps I needed in stainless! I replaced them both tod…

Hi guys, I’ve been troubleshooting my P1690 code using Mopar1973man’s forum and found myself stuck on step 7. The procedure says to check resistance between FPCM pin 8 and ground. My problem is that i’m not seeing any continuity here. I do however have good resistance from FPCM pin 8 to ECM pin 18 (which was an earlier step in the procedure). Looking through the wiring diagrams I don’t see how FPCM pin 8 gets ground. Should I really be getting ground from pin 8? Any input for where this ground gets picked up is appreciated.

My truck is now on its 3rd alternator since getting the truck last September. Previous owner a friend of mine put one in and it died on me about 3 months in and was under warranty. Second one lasted until yesterday morning was about 50-60 degrees out started the truck the check gauges light stayed on for 20 seconds or so then came up to 14v drove 20 seconds up the street and it dropped back down so I pulled over and the alternator was smoking hot and litterally smoking. Never came back up to 14v still spins freely. Ended up getting another on under warranty at orileys. I think they are the ultima brand i can find out though. What gives though? Truck was fine yesterday and…

02 24v i swapped 5spd in place of the auto. Im still using auto ecm/pcm with no check engine lights. Occasionally the trans temp light stays on for a few min then shuts off. The throttle response is weird and Occasionally wont rev past 19-2000rpm. Apps checked out. I've been using the search function and have found that i need ecm/pcm reflashed? Does anyone know if this can be accomplished with a tuner? (Or do i need to find a manual ecm/pcm.)If so any recommendations? I already tried calling a dealer. They had absolutely no idea what I was talking about. Any advice is appreciated.

2001 Dodge 2500-manual trans. Problem started when I lost prime voltage to lift pump CEL (check engine light P1693 code) power supply wire tested at 8.2 volts in the start prime position but I had good voltage in run. Sent ECM in for testing repairs. -Repaired/tested ECM had good lift pump voltage after repairs, no codes or CEL but severely delayed throttle response to the point it was un-drivable. Tested APPS as per Mopar1973 posts. -ECM Vendor provided replacement rebuilt ECM, Truck runs, good voltages to lift pump, as soon as I pull onto the road I get CEL/MIL P1693 code unable to pull any other sub codes. Used 3 different OBD II scanners with nothing. -Repl…

Hey Guys, I really need your help on this one. I have been chasing an intermittent dead pedal and hesitation issue and I'm not sure what could be causing it. It does not happen all of the time, there will be days that i drive the truck and it doesn't happen at all and other days where it happens multiple times. It doesn't matter if the engine is warm or cold either. It usually happens under acceleration, but it has happened while cruising. I will go to accelerate from a light and nothing happens when i push the pedal for about 2 seconds and then it will kinda sputter and then accelerate like normal. I put a new VP on the truck in July and after talking with Mast…

First time posting on this site, i have to say this site is amazing always have found stuff that has helped me. Well im hoping someone could explain whats houng on with my truck. First and foremost the truck is a 1999 2wd 5 speed 3500 2nd gen cummins and it has a cold air intake and a intake horn, edge ez, 50hp injectors, new H. O vp44. The truck has 307k miles and runs amazing and has no issues. But when im driving on the highway at a steady speed around 80mph the sound in the engine bay will change every 15-20 seconds it is most deffinetly the sound of combustion changing and or the injection timing changing. The truck will have the typical knocky 24v clatter that sound…

Finally purchased a rebuilt VP44; it arrived yesterday & the swap was today's project. Replaced the factory VP44 11 years ago. And apparently, I significantly over tightened the high pressure lines on the back of the replacement VP44 because I really struggled to get them off. Modified a 17mm crows-foot flarenut wrench to get enough back pressure then I was able to get the line nuts to finally brake free. My guess is i was trying to get the lines to not leak. Now the ends are mushed over (see pic). Hard for me to believe I tightened them that much but obviously I did (I was broke down out-of-town...might have had something to do with it). …

I’ve got codes 0253, 1689, and 1688 so I think I did a pretty good job of cooking the vp44. DAP is getting me set up with a new one but before I put it in, does anyone have any recommendations for things I should look at to preserve the next pump? i have over boost code 0234 so I’ll check the waste gate to see if it moves (I guess?) also am planning to check ac noise and do the w-t mod. i have the DAP intake elbow, quadzilla, and stealth plate coming too

Hello everyone, New to the forum here, have a 2000 Dodge 24 valve. I’m a mechanic by trade, bought the the truck off one of our customers. He had this issue towards the end of his ownership, truck would surge during idle and the odd time would throw APPS code but he could still drive it. The trucks had a couple different APPS sensors, OEM and aftermarket. When I bought the truck last summer I did a ton of upgrades/maintenance, starter, alternator, 2 new batteries, FASS and sump, fuel pressure gauge and a bunch of other things non related to the problem. I did all the APPS testing between sensor and ECM and everything checked out. After doin…

I'm looking at purchasing an s475 to replace my s366 I got unintentionally.. I found a boostlabs s475 83 .90 T4 for sale brand new for $600 on marketplace.... I would be using it for twins so the t4 has got to go. I hear there are 2 different CHRA's on the t4 vs t6 turbos. That being said how would I go about swapping to a 1.10 or similar t6 housing. Need completely new bearings housing and turbine housings?? That sounds far too expensive to be worthwhile. From what I can tell the bearing housings a mostly identical except for the diameter where the exhaust housing clamps on. Also what's the deal with the 83/74 and 87/80 and 88/96 wheel si…

First atf change on my rebuild transmission and I figured I'd throw in a transgo shift kit in it while I was in it. I really wish I took readings of pressures before I tore into it. Now I'm looking at 90 psi at 1200 rpm dead stop and 120 psi with the tv valve all the way foward at 1200 rpm. I've done a bunch of reading on this site and read some great guides. But I cant find someone with the same problem I'm having. According to transgo I should be seeing closer to 120 -155. Only other mods to the transmission was a single disc billet torque converter and a upgraded 2nd gear strut and anchor. Am I ok to run at these pressures? Is my pump going out? Or do I need to upgrade…

Total rebuild on 00 24v. I put in my 02 truck with rebuilt nv4500. I’m having trouble finding the correct wiring harness to make this work. Can anyone point me in the right direction please. Or can I just use the ecm/pcm from my 02 and make it work?

First of all a big thanks to everyone. I have been lurking around and this forum has helped me a lot. I bought the truck recently so im not sure what all was done but it was built for compounds and they ran that some and it looks like they about caught the firewall on fire and went to the S300. I was told it has an upgraded pump. I don’t know. It’s green or blue I’m not sure if that helps. I have the tune dialed in for driving around and up to 5th gear. Pretty sure the map is good for what I have as I bumped everything up 2 and it was just straight smoke. I did try a big injector tune I found on there that started at 70, went…