PO441 and a momentary rough idle just after startup
#1
PO441 and a momentary rough idle just after startup
Hi, looking for some guidance. I have a 2003 4.7l Dakota. I have addressed about 10 PCM codes from my own investigation and a series of visits over the last 5 months to both a general mechanic and a transmission pro. They addressed EVAP codes, TPS sensor, Cam Position Sensor, Trans solenoids, and others. New gas cap, and a thousand dollars later - truck runs great but I am still getting a P0441 - and the only symptom is a consistent "lull" in the idle, or upon acceleration, for just a moment, within the first minute or two of startup, then it goes away and drives fine.
I've gone back to the mechanics and asked for a list of what was addressed in the EVAP system, to start down the process of elimination route, but I wanted to ask, based on that "lull" either in the idle, or just as I try to accelerate, and that one P0441 code, if anyone can point to a specific system, location or process - ie, like the purge valve or the canister to look first.
There's a number of threads and views on the subject in the forum, so I imagine this is a topical issue for owners of that age truck.
thanks--
I've gone back to the mechanics and asked for a list of what was addressed in the EVAP system, to start down the process of elimination route, but I wanted to ask, based on that "lull" either in the idle, or just as I try to accelerate, and that one P0441 code, if anyone can point to a specific system, location or process - ie, like the purge valve or the canister to look first.
There's a number of threads and views on the subject in the forum, so I imagine this is a topical issue for owners of that age truck.
thanks--
Last edited by tdes; 04-25-2017 at 01:34 PM.
#2
After learning that most of the hoses and the canister had been changed, and some more youtube/google research, I chose to simply change the $33 part- purge valve/solenoid and <1 min to change. I reset the PCM, took it for a drive and, at this early stage it seems to be cured. I expect it may take a few hundred miles for the PCM to give me a code if an error still exists, but for now, easy fix.
For the heck of it, I will make it a separate project to diagnose / confirm the old solenoid failed with a multimeter.
For the heck of it, I will make it a separate project to diagnose / confirm the old solenoid failed with a multimeter.
#3
After learning that most of the hoses and the canister had been changed, and some more youtube/google research, I chose to simply change the $33 part- purge valve/solenoid and <1 min to change. I reset the PCM, took it for a drive and, at this early stage it seems to be cured. I expect it may take a few hundred miles for the PCM to give me a code if an error still exists, but for now, easy fix.
For the heck of it, I will make it a separate project to diagnose / confirm the old solenoid failed with a multimeter.
For the heck of it, I will make it a separate project to diagnose / confirm the old solenoid failed with a multimeter.
Last edited by Dodgevity; 04-26-2017 at 08:02 PM.
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Back to the drawing board, the stuttering still exists while throttling just after startup, while the P0441 code has not resurfaced - but it's only been a hundred miles. I will have to do some more research, my thought is still that it's only related to whatever fuel/computer process is relevant during the first 2 mins start up.
any guidance is a big help -
any guidance is a big help -
#7
Back to the drawing board, the stuttering still exists while throttling just after startup, while the P0441 code has not resurfaced - but it's only been a hundred miles. I will have to do some more research, my thought is still that it's only related to whatever fuel/computer process is relevant during the first 2 mins start up.
any guidance is a big help -
any guidance is a big help -
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