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idle problem, but different

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Old 03-20-03, 08:56 PM
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idle problem, but different

hey whats up, im kinda new here, i tried to seach but nothing helped me. ok here is my problem, my car starts up, and when it is cold it idles steady at about 950rpm
( i know its a little high, but o well). but then when my car warms up the idle starts to jump, like somewhat bad, but it stops the second i put my a/c on, and will start again if i turn it off, please help, thanks in advance for you help
Old 03-21-03, 05:45 PM
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It's probably the BAC (bypass air control) valve, especially if it runs fine when put into gear. I've had to replace this thing on both my Rx-7s...
Old 03-21-03, 06:45 PM
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Originally posted by Amur_
Checking the BAC:
https://www.rx7club.com/forum/showth...&highlight=BAC

Cleaning the BAC:
http://fc3s-pro.com/TECH/PROBLEMS/EM/bac.htm


Btw, have you checked your TPS?

http://fc3s-pro.com/TECH/HOWTO/TPS/tps.html

(It's shown being done on a TII, but the technique is the same for NAs.)
Old 03-21-03, 10:01 PM
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thanks alot, where can get a BAC valve, and how much are they
Old 03-21-03, 10:49 PM
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New - dealership. $$$

Used - try www.rx7world.com or pm hypntyz7 or Icemark (one of them may have a spare kicking around.)

Don't know what a fair price is - I've never bought a used one. Don't pay more than $300.
Old 03-21-03, 10:56 PM
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well im going to try and fix it first, since im only 15 and i dont have 300 bucks to blow on a part that isnt absolutly needed. but i will try to look for one around here, if any1 has one please tell me. thank you very much
Old 03-21-03, 10:59 PM
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I was kidding about the $300 part. See the winking smilie? PM those guys. I'm certain it'll be tens of dollars at most.
Old 03-21-03, 11:02 PM
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oh ok, i get it
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