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No idle after dead battery

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Old Oct 11, 2010 | 05:19 PM
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deadeye1122
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Default No idle after dead battery

Long story short. leave doors open, battery goes dead enough to not start truck,jump truck with cables, won't idle. runs if you keep your foot on the gas. have had a charger on for the last 3 hours. ECM/ECU have to relearn or something??thx deadeye
 
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Old Oct 11, 2010 | 05:32 PM
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Yes, the PCM needs to re learn.
 
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Old Oct 11, 2010 | 06:02 PM
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Thx ZMAN. Any special way to relearn or just drive as normal? Went around alot of blocks and stops. Died 3 times at stops. Fortunately at one there wasn't anybody there. deadeye.
 
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Old Oct 11, 2010 | 06:07 PM
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Should just have to drive it around for a bit, or, sit in the driveway with your foot on the gas.....
 
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Old Oct 11, 2010 | 07:56 PM
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Common with mine, drive with two feet.
 
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Old Oct 11, 2010 | 09:48 PM
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if the battery is fully charged now, you can reset the pcm to speed up the learning process. disconnect neg battery cable and turn on headlights for 30 sec to drain the pcm memory. if that doesn't help, your battery voltage is still low.
 
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Old Oct 12, 2010 | 03:17 PM
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Thx all, short road trip with stops and all is well. Next post I'll try and use the correct terminology. Now how to set the clock on the Pioneer radio?
 
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Old Oct 12, 2010 | 04:57 PM
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Same thing happened to my 97 while on a trip, a young chrysler tech in Duluth told me I had to teach the PCM to idle. Told me to hold the accelerator pedal just enough to prevent stall. Took about a minute, then all was well.
 
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Old Aug 4, 2022 | 07:43 AM
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Originally Posted by dhvaughan
if the battery is fully charged now, you can reset the pcm to speed up the learning process. disconnect neg battery cable and turn on headlights for 30 sec to drain the pcm memory. if that doesn't help, your battery voltage is still low.
AMAZING - I can not believe how well this worked for me!! My truck runs better than before the stalling nonsense all started. Thank You !!!
 
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