Cold v Warm - PCM that is
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Tuned
Joined: Apr 2004
Posts: 428
Likes: 74
From: Aroostook County, Maine
Cold v Warm - PCM that is
Since having a spare PCM bailed me out a few months ago, it is time to get another spare. For the e99 manual, pretty much limited to the DPC-401 group. Since it is already -10F tonight, the cold weather versions are where I am headed (which is what I have).
But what is the difference in programming - cold v warm? I am guessing Glow Plug times at a minimum. Is there some sort of high idle strategy built in? Neither of mine have any sort of high idle time baked in. Is combustion adjustment made as a function of coolant temp? Not sure how that works on mine since CoolTempSensor is a dummy reminder only. There cant be any feedback on transmission temps, since there isnt anything measuring it.
Long and short, is there any way to see the root programming of one of these PCMs? I hunted around a few years ago, but came up small.
Thanks!
But what is the difference in programming - cold v warm? I am guessing Glow Plug times at a minimum. Is there some sort of high idle strategy built in? Neither of mine have any sort of high idle time baked in. Is combustion adjustment made as a function of coolant temp? Not sure how that works on mine since CoolTempSensor is a dummy reminder only. There cant be any feedback on transmission temps, since there isnt anything measuring it.
Long and short, is there any way to see the root programming of one of these PCMs? I hunted around a few years ago, but came up small.
Thanks!
Butt-Head
Joined: Apr 2004
Posts: 9,448
Likes: 2,934
From: Reed Point, MT
Since having a spare PCM bailed me out a few months ago, it is time to get another spare. For the e99 manual, pretty much limited to the DPC-401 group. Since it is already -10F tonight, the cold weather versions are where I am headed (which is what I have).
But what is the difference in programming - cold v warm? I am guessing Glow Plug times at a minimum. Is there some sort of high idle strategy built in? Neither of mine have any sort of high idle time baked in. Is combustion adjustment made as a function of coolant temp? Not sure how that works on mine since CoolTempSensor is a dummy reminder only. There cant be any feedback on transmission temps, since there isnt anything measuring it.
Long and short, is there any way to see the root programming of one of these PCMs? I hunted around a few years ago, but came up small.
Thanks!
But what is the difference in programming - cold v warm? I am guessing Glow Plug times at a minimum. Is there some sort of high idle strategy built in? Neither of mine have any sort of high idle time baked in. Is combustion adjustment made as a function of coolant temp? Not sure how that works on mine since CoolTempSensor is a dummy reminder only. There cant be any feedback on transmission temps, since there isnt anything measuring it.
Long and short, is there any way to see the root programming of one of these PCMs? I hunted around a few years ago, but came up small.
Thanks!
Later ones could have actually been ordered without the backpressure sensor and valve.
It's really quite stupid that there were separate calibrations and hardware changes at one time. I guess some calibration engineer decided that he needed to justify his existence.
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Tuned
Joined: Apr 2004
Posts: 428
Likes: 74
From: Aroostook County, Maine
In that case, I guess it doesn't matter cold v warm. Thanks!
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