1997 Mazda 626 High Idle

1997 MAZDA 626
17,000 MILES • 4 CYL • FWD • AUTOMATIC
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RLBROTHERS
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Hi, I am working on a 97 Mazda 626
Original fault was IAC, but pulled IAC it looks like it is working.
Symptom is high idle, around 2k. When throttle is tapped, the engine revs, then drops drastically to a normal idle, then quickly rises to 2k again.
Other codes that I have seen are P0113, P0122, P0304, P0302. Keep in mind I have been toying with things so some of these could be false. I have erased but no new ones have appeared even though the symptoms persist. Also, unpluging the IAC has no effect. If I remove the IAC and block the hole, the idle returns to normal. However, I can see the IAC plunger moving when its out. Thanks. /rick
Oct 27, 2010 at 4:12 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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