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Old 5-2-08, 20:29   #1 (permalink)
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Idle speed goes up and down when the car is not moving

Hello all, as you can see I am new here, but I am an avid fan of the Mazda MX6, so much so that I recently bought a 94 MX6. The only issues on the car are that the idle speed goes up and down when the car is not moving.

A mechanic told me that it's the idle speed actuator, but I wanted to do some research and see if I can get some help. Thank you guys in advance and I hope to post pictures of my ride soon.
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Old 5-2-08, 22:56   #2 (permalink)
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there are many possibilities, first you could have a vacuum leak somewhere, loose wires on you ECU or Throttle position sensor, it could even be an air bubble in ur coolant system, i just fixed the same issue on my 6

'93 MX6 ZE Dark Force CAI, lightened Flywheel, 2nd stage clutch, walbro, FPR, and J-spec VAF/ECU

Parting out 1993 ZE Full JSPEC
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Old 5-3-08, 12:17   #3 (permalink)
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Also, what is the idle jumping from?

If you have your AC on remember that whenever the compressor kicks on it'll boost your RPMS from 650 about about 750-850.

"Dream as if you'll live forever, live as if you'll die today" James Dean

DRINK BEER!
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Old 5-3-08, 12:44   #4 (permalink)
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as mentioned earlier, a lot of things could be causing this.

i would suggest that since you're new, try searching these specific forums for help on a "surging idle" or "idle issues". odds are, you'll find a TON of suggestions and help in the results.

damon™

ProbeTalk.com / Southern California Probe [and MX-6] Owners Club
1993 ford probe gt
1994 mazda mx-6 ls
2001 ford svt mustang cobra
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Old 5-3-08, 13:01   #5 (permalink)
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I forgot to mention that the guy who sold it to me and a mechanic I know told me that it was the "idle speed actuator" that was the problem.

I have looked for it everywhere on the internet and can not find that part anywhere.
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Old 5-6-08, 14:48   #6 (permalink)
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^any help?
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Old 5-6-08, 14:50   #7 (permalink)
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Originally Posted by Jayvee View Post
^any help?
did some 1 mention IAC yet that could be your problem my bro. had the same issue asoon he fixxed his IAC car was golden or TBS? check those things out & see if that works 4 you or not
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Old 5-6-08, 16:11   #8 (permalink)
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^ i have no idea wat the IAC or TBS are. what do those stand for?

noob i know.
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Old 5-6-08, 21:48   #9 (permalink)
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my car had the same problem and it was carbon build up on the throttle plate. try taking off the intake and see if its got build up.
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Old 5-9-08, 23:12   #10 (permalink)
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IAC - Idle Air Controller
TPS - Throttle Positioning Sensor
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Old 5-10-08, 1:40   #11 (permalink)
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How old are the O2 sensors? they can also cause this problem

'93 MX6 ZE Dark Force CAI, lightened Flywheel, 2nd stage clutch, walbro, FPR, and J-spec VAF/ECU

Parting out 1993 ZE Full JSPEC
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Old 5-10-08, 2:00   #12 (permalink)
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eBay Motors: 93/97 Ford probe mx6 626 IAC Idle control valve V6 2.5 (item 260237562256 end time May-12-08 18:11:33 PDT)
eBay Motors: 93-97 PROBE MX6 626 MX3 TPS THROTTLE POSITION SENSOR (item 190220781826 end time May-14-08 18:19:40 PDT)

looks like this

'93 MX6 ZE Dark Force CAI, lightened Flywheel, 2nd stage clutch, walbro, FPR, and J-spec VAF/ECU

Parting out 1993 ZE Full JSPEC
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Old 5-12-08, 14:59   #13 (permalink)
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Well where exactly can I find these things on the engine?

I mean, I could always have a mechanic just look at it and fix it, but if it's something easy that I can fix, I'd rather do that for obvious reasons (money).
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Old 5-13-08, 23:16   #14 (permalink)
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they bolt onto the intake manifold, i'd show you a picture but i don't have one available. they aren't hard to replace. the hard part is getting the part for cheap lol
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Old 5-14-08, 16:07   #15 (permalink)
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Smile

Yeahhh true those parts are hard to find cheap...that is agreed but one thing I would like to add is the fact that my car did the same thing n My Mazda Dealer said it was a mass airflow meter for the engine idle surging so I bought one from a junk yard for $50 and now my car runs good no problems...
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