Jimijack

I really appreciate the help, so thanks again 🙏🏻

I appreciate the very detailed responses from you guys. It’s definitely hard to believe (but I will have to swallow) that I received a refurbished Thoroughbred Diesel VP-44 with a bad PSG. I actually paid $225 more for this VP-44 because they said it would be a brand new PSG, instead of an existing PSG that is only tested for function. I will go through the testing procedure that you gave me to verify. I actually found today that I have a 920, 921, and 999 error codes from the key on check, which I think are just the standards for a bad PCM or “no bus”connection?

Yes my wait to start light comes on and goes off as it should when the key is turned to the “on” position. Every discussion thread that I’ve read concerning a “no bus” error deals with the instrument cluster gauges not working, however my gauges all appear to be working as they should and don’t go off or act erratic. Of course, I do have a “check engine” light on, along with a “brake” light and an “airbag” light. I changed the master cylinder and I have not bled the brakes yet, so that might be the “brake” light issue.

I bought this 2001 dodge ram 2500 quad cab 4 x 4 with a 5.9L Cummins diesel for $500 and I have already put thousands of dollars into it, so I’m glad I didn’t pay more. I received the truck as is, and it would start and idle, but when you push the gas it only has one speed, which is 1400 RPM no matter how much pedal you give it and my odometer is displaying a “no bus”error, however all of my gauges do work. The truck had an adrenaline tuner on it, which I verified with the company that it was bad, so I pulled it all off. I have a compound turbo set up, and they spin and the impellers appear tight and no leaks in the boots. I have 120 hp injectors installed and studded heads, along with a 4 inch exhaust, which were all installed by a previous owner. (unfortunately I have no access to the previous owner because my nephew purchased this truck and I got it off of him. Apparently the VP 44 was replaced just before I got it and the previous owner gave up on it). The first thing I did was put a new lift pump (Air Dog 100) on it and right now I have between 15 psi and 20 psi after the water/ fuel separator, so pressure is great. I sent my PCM and my ECM out to be tested and refurbished, however when I got them back and installed nothing changed. I also got a refurbished dash cluster, that is correct for my truck and guaranteed, but nothing changed. I cleaned every ground on the truck, and nothing stood out with those and nothing changed. I replaced the body control module and replaced the VP 44 injection pump a second time, and when that was done, nothing changed. I changed the cam position sensor and MAP sensor, and nothing changed. I checked all wiring harnesses and repaired any suspect wiring. I changed my a APPS sensor with one already mounted on a bracket and I have 4.70 V going to it. (I should know if that the only way to start the truck is to push the gas pedal to the floor, otherwise it will not start, but it will idle great all day long with a very slight surge) I unplugged every single sensor in order to see if it would make a difference with the “no bus” issue, but nothing changed. Also I should note that every sensor connector, PCM, and ECU, have been cleaned and dielectric grease put into the connectors. There are no codes that I can get to display on the odometer with the key on and off three times, and the batteries are constantly being connected and disconnected since there is a drain on the batteries, so I don’t think, even if I had a code reader, that I could get any codes from it…I’m at my wits end with this thing. I know I threw a lot of parts at it, but it was all a learning experience and now I’m beginning to know the joy of owning a 24 valve dodge Cummins diesel truck, like the back of my hand… any help or advice would be much appreciated, thank you!