1997 Mazda Protege Reset Check engine light, now not idling

1997 MAZDA PROTEGE
104,700 MILES • 4 CYL • FWD • MANUAL
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LALONDNM
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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?
Aug 2, 2010 at 3:37 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
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Clean and test the idle air control valve and also the throttle position sensor-
Aug 2, 2010 at 4:56 PM
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LALONDNM
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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?
Aug 2, 2010 at 6:10 PM
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RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
When you disconnected the battery tryng to reset the computer you caused the computer to lose its memory, it probably needs an idle relearning -
Aug 3, 2010 at 2:17 AM
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LALONDNM
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I disconnected the negative side of the battery. So just to confirm, I should still check those parts that you recommended?
Aug 3, 2010 at 10:46 AM
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