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1997 Mazda Protege Reset Check engine light, now not idling

Tiny
LALONDNM
  • MEMBER
  • 1997 MAZDA PROTEGE
  • 4 CYL
  • FWD
  • MANUAL
  • 104,700 MILES
My Mazda had a check engine light on, couldn't find anything wrong with it, so it was reset by removing the negative side of the battery and holding the brake for 30 seconds. Now when I start the car initially, it won't idle properly. It goes almost to zero and almost stalls out and then goes up to about 800 RPM. Do you know what could be done to fix this idling problem?
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Monday, August 2nd, 2010 AT 3:37 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean and test the idle air control valve and also the throttle position sensor-
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Monday, August 2nd, 2010 AT 4:56 PM
Tiny
LALONDNM
  • MEMBER
  • 3 POSTS
It idled just fine when we started the car before so how could those parts need to be checked now? Or how could they be bad?
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Monday, August 2nd, 2010 AT 6:10 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When you disconnected the battery tryng to reset the computer you caused the computer to lose its memory, it probably needs an idle relearning -
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Tuesday, August 3rd, 2010 AT 2:17 AM
Tiny
LALONDNM
  • MEMBER
  • 3 POSTS
I disconnected the negative side of the battery. So just to confirm, I should still check those parts that you recommended?
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Tuesday, August 3rd, 2010 AT 10:46 AM

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