2003 Chrysler Concorde: after changing battery, engine runs rough and will not idle. It just bogs down and shuts off.
Jul 24, 2011 at 9:23 PM
Idle problem
2003 CHRYSLER CONCORDE
GREGMC
- MEMBER
- 1 POST
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RASMATAZ
- ✓ASE Certified Mechanic
- 75,992 POSTS
The computer loses its memories when battery is disconnected-it probably has to relearn itself
Jul 24, 2011 at 9:54 PM
CARADIODOC
- ✓ASE Certified Mechanic
- 34,321 POSTS
Rasmataz is right. Here's the procedure:
The Engine Computer lost its memory and has to relearn "minimum throttle" before it will know when it must be in control of idle speed. It also might not give you the normal "idle flare-up" to 1500 rpm when you start the engine. To meet the conditions for the relearn to take place, drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals.
The Engine Computer lost its memory and has to relearn "minimum throttle" before it will know when it must be in control of idle speed. It also might not give you the normal "idle flare-up" to 1500 rpm when you start the engine. To meet the conditions for the relearn to take place, drive at highway speed with the engine warmed up, then coast for at least seven seconds without touching the brake or gas pedals.
Jul 24, 2011 at 10:39 PM
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