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Car wont idle and will stall after battery disconnected

Tiny
LU4COR23
  • MEMBER
  • 2002 LEXUS ES 300
  • 152,000 MILES
Went to disconnect neg battery cable, went back to connect it, car will start, but will not idle. I've driven it about 10-15 miles to try computer relearn procedures, and i've tried touching the battery terminals together. Worked for a little but then car died.
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Saturday, February 4th, 2012 AT 11:57 PM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the idle air control valve and also scan the computer for code/s
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Sunday, February 5th, 2012 AT 12:14 AM
Tiny
OXAMANDUHX
  • MEMBER
  • 11 POSTS
You will need to do the IDLE RELEARN. Basically you start it and keep the RPMs over 1500 for a while then go drive it for 20 min above 55 to 60
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Wednesday, February 8th, 2012 AT 9:13 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
When air passages for the idling system are clogged, disconnecting the battery would cause stalling.

Relearning is required but cleaning the idle control system would eliminate the stalling even while it is relearning.
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Thursday, February 9th, 2012 AT 9:50 PM

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