Ok Gang...I've got a project on a 2002 Dodge Cummins 2500 (no not mine). I've installed a fuel pressure gauge it holding 15-16 PSI at idle and about 11-12 PSI at WOT but at low speeds that I've seen. Here is the problem the codes have P0216 code present no others but its got a partial dead pedal. You can mat the pedal to the floor and it barely rolls along at 5-15 MPH then all of sudden like the ECM or the VP44 wakes up and hang on she powering up. There is no codes for APPS sensor so I'm not considering the APPS sensor. But now I know that 2 cases of ECM failure I seen where the throttle is limited (CajFlynn is one of them). Knowing both the ECM and VP44 are $1,000 dollar items I need to figure out a way of verifying this problem for the owner. Help us out gang!

Michael, I'm kind of surprised you didn't suspect this sooner. Especially with you being the 'puter guy and knowing how critical is it for 'puters to have a "reliable and consistent" flow of electrons within a certain range of volts and amps etc.!! It's amazing sonetimes that these 'puter controlled trucks run at all sometimes due to the variable nature of voltage, amps and ohms!!!!!!!

What was funny about it when I voltage tested them they shown a bit low in voltage 12.4 while hooked to the truck. Then when running they where at 14.1 Volts but it took a little bit to recover. The only thing that made me actually give up on the batteries was the age. So what was strange after he drove down to my place and I changed them out the batteries sat in the driveway for 2 hours or so and tested the voltage again 12.8 Volts. So that shows me that amp capacity of the batteries was getting short anyways.

What was funny about it when I voltage tested them they shown a bit low in voltage 12.4 while hooked to the truck. Then when running they where at 14.1 Volts but it took a little bit to recover. The only thing that made me actually give up on the batteries was the age. So what was strange after he drove down to my place and I changed them out the batteries sat in the driveway for 2 hours or so and tested the voltage again 12.8 Volts. So that shows me that amp capacity of the batteries was getting short anyways.

Michael, I was just "saying"...........not "arguing" in my prior post!!!! I would've firgured it out after a whole lot more replacement parts.............that's for sure!!!:banghead: Later. Joe

What was funny about it when I voltage tested them they shown a bit low in voltage 12.4 while hooked to the truck. Then when running they where at 14.1 Volts but it took a little bit to recover. The only thing that made me actually give up on the batteries was the age. So what was strange after he drove down to my place and I changed them out the batteries sat in the driveway for 2 hours or so and tested the voltage again 12.8 Volts. So that shows me that amp capacity of the batteries was getting short anyways.

Sorry i was late for class. can you please explain your battery troubleshooting results?

Michael, I was just "saying"...........not "arguing" in my prior post!!!! I would've firgured it out after a whole lot more replacement parts.............that's for sure!!!:banghead: Later. Joe

No arguing... Actually in total agreeance!

Sorry i was late for class. can you please explain your battery troubleshooting results?

State of charge is checking the battery voltage after appriximately 3 hours. Typically disconnected.

When I showed up the owner's house I brought my DVM (Digital Volt Meter) check the standing at rest battery voltage 12.4 Volts been sitting for better than 24 hours but hooked up to the truck. So now started the truck and saw the alternator take a bit of time to push up to 14.1 Volts which is good. But after shutting down it took less than a few minutes for the batteries to fall back 12.4 volts again.

So knowing the batteries are 10 years old and the owner only drives the truck maybe 6K-8K a year. So I know the batteries are pretty well done in age. But when I replaced the batteries and left the old ones sit on the ground for over 2 hours the voltage was 12.8 when I checked them. So I'm going to have to say the batteries are charging but the cold cranking capacity is been greatly reduced for such small draw to pull it down 12.4 volts.