engine running concerns

2004 MAZDA 6
162,000 MILES • 6 CYL • FWD • AUTOMATIC
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BRIANPARKER
  • MEMBER
  • 1 POST
My 2004 Mazda (3 litre v6) surges (sometimes violently) when I stop in traffic. why
Apr 7, 2011 at 1:15 PM
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WRENCHTECH
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 20,761 POSTS
You may have a bad IAC ( idle air control) but try eliminating any vacuum leaks and cleaning the throttle body first. Remove the intake snorkel, have someone hold the throttle wide open for you and scrub the back side of the throttle plate and surrounding bore with an old tooth brush and some carb cleaner. Be sure to spray some into the small holes next to the throttle plate. That should help stabilize the idle. If it still has a problem, replace the IAC.
Apr 7, 2011 at 1:27 PM
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