The purpose of this thread, at least in its infancy, is to document what is happening and my plans of action to fix it. I feel like its a 'rare' problem (in that I cant find another thread with the exact same issue), it is certainly unique!
As of the day of this rambling, the truck is just under 114k miles. 2001 2500, auto, stock, 4x4, loaded, etc..
Previously I had a thread wherein my grandpa still owned the truck and he was having the usual TC/OD issues. Never really did figure out what was causing that as the descriptions I had to work with were challenging at best, but I did the TPS signal wire TEE mod earlier this year, or whatever its called, from the TPS directly to the PCM and ECM. That fixed the TC/OD issue, plus it cleaned up the shifting. Definitely recommend that to anyone who hasnt done it!
Also had an issue with the cruise surging heavily pretty much all the time. I believe that was because of the hole in the vacuum line, some heat shrink over the tube fixed that up real quick.
But now, I am having an issue wherein the throttle just has a mind of its own occasionally. Typically only after the vehicle has been ran and heat soaked pretty well, or has sat for a minute, shut off, and restarted. It does not always act goofy and just randomly start accelerating once it is hot. It does it sporadically. At the same time, the throttle becomes EXTREMELY sensitive. No exaggeration, if you just move the pedal a millimeter or even just rest your foot on the pedal, the RPMs will get all sorts of goofy. Its pretty wild.
When the truck accelerates by itself, it will typically pop up a CEL immediately (P1693, which is actually a P0121), and occasionally the pedal will go dead after one of these episodes. Press the pedal a time or two, almost like a relearn, and it usually works fine for a bit. usually a half mile up the road it will do some goofy stuff again. This repeats until the truck cools for some time.
With the premise being set with the issue, I am fairly certain this is an APPS issue. This truck has not been ran hard ever. It has pulled 5th wheels, but RPMs were always kept below 2k. All that to say, I dont think its the VP. Truck runs great, plenty of power, etc.
My first action is going to be to install a spare Mopar APPS that I have (I want a TIMBO, but until I know for sure, it will wait). I believe it is the original, as G-pa had the dealer put on a new one back in, 2019/2020. I would have to check his records. I suspect that the APPS is the issue, so this thread might only be 3 posts long. If that does not fix the issue, my next step will be to monitor signal voltages while driving as well as APPS % in Torque and see if I can catch a discrepancy.
Feel free to follow as I keep my truck from driving off by itself.
The purpose of this thread, at least in its infancy, is to document what is happening and my plans of action to fix it. I feel like its a 'rare' problem (in that I cant find another thread with the exact same issue), it is certainly unique!
As of the day of this rambling, the truck is just under 114k miles. 2001 2500, auto, stock, 4x4, loaded, etc..
Previously I had a thread wherein my grandpa still owned the truck and he was having the usual TC/OD issues. Never really did figure out what was causing that as the descriptions I had to work with were challenging at best, but I did the TPS signal wire TEE mod earlier this year, or whatever its called, from the TPS directly to the PCM and ECM. That fixed the TC/OD issue, plus it cleaned up the shifting. Definitely recommend that to anyone who hasnt done it!
Also had an issue with the cruise surging heavily pretty much all the time. I believe that was because of the hole in the vacuum line, some heat shrink over the tube fixed that up real quick.
But now, I am having an issue wherein the throttle just has a mind of its own occasionally. Typically only after the vehicle has been ran and heat soaked pretty well, or has sat for a minute, shut off, and restarted. It does not always act goofy and just randomly start accelerating once it is hot. It does it sporadically. At the same time, the throttle becomes EXTREMELY sensitive. No exaggeration, if you just move the pedal a millimeter or even just rest your foot on the pedal, the RPMs will get all sorts of goofy. Its pretty wild.
When the truck accelerates by itself, it will typically pop up a CEL immediately (P1693, which is actually a P0121), and occasionally the pedal will go dead after one of these episodes. Press the pedal a time or two, almost like a relearn, and it usually works fine for a bit. usually a half mile up the road it will do some goofy stuff again. This repeats until the truck cools for some time.
With the premise being set with the issue, I am fairly certain this is an APPS issue. This truck has not been ran hard ever. It has pulled 5th wheels, but RPMs were always kept below 2k. All that to say, I dont think its the VP. Truck runs great, plenty of power, etc.
My first action is going to be to install a spare Mopar APPS that I have (I want a TIMBO, but until I know for sure, it will wait). I believe it is the original, as G-pa had the dealer put on a new one back in, 2019/2020. I would have to check his records. I suspect that the APPS is the issue, so this thread might only be 3 posts long. If that does not fix the issue, my next step will be to monitor signal voltages while driving as well as APPS % in Torque and see if I can catch a discrepancy.
Feel free to follow as I keep my truck from driving off by itself.