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Idle problem

Tiny
GREGMC
  • MEMBER
  • 2003 CHRYSLER CONCORDE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 86,800 MILES
2003 Chrysler Concorde: after changing battery, engine runs rough and will not idle. It just bogs down and shuts off.
Sunday, July 24th, 2011 AT 9:23 PM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The computer loses its memories when battery is disconnected-it probably has to relearn itself
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Sunday, July 24th, 2011 AT 9:54 PM
Tiny
CARADIODOC
  • MECHANIC
  • 33,727 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.
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Sunday, July 24th, 2011 AT 10:39 PM

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