Question about 1992 Mazda MX-5

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How do you adjust the idol on a 92 mazda miata. It idols ok until I turn the air off them the car dies. Thanks Shelley

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Shelley,
This gentleman has written a pretty good guide for checking and adjusting your ignition timing and idle - http://www.mx5oc.co.uk/forum/forums/t/208.aspx
Try adjusting your idle - I wouldn't be surprised if this is not your problem (or only problem). If the idle is still drooping (or cutting out), you might like to think about checking, cleaning or replacing your air filter, cleaning your throttle body and possibly checking the correct function of your two clutch switches which can all cause similar problems.
The clutch switch problem is becoming somewhat more common now - have you tried idling the car without A/C? Then experiment with doing the same with the clutch depressed and then with the clutch depressed and a gear selected...if one of these combinations stops your idle problem, you'll probably find one of the clutch switches is dead. The purpose of the switches and the reason for the problem is a little complicated - if this turns out to be the case, reply and I'll try to explain it properly.

Posted on Sep 01, 2009

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Posted on Jan 02, 2017

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my old 1989 mazda had this problem as well but i traded it in before figure it out. my new but old 1999 started doing the same. it was the ignition switch. if u do buy it, buy it from an autoparts store with a life time warranty. the dealer offers ****, 10k miles or 6 mths? it has only 2 or screws,bolt? to take out and should take no more then 30 minutes to replace. pop off the steering column covers and its located where you stick the key in. its a little white and black cylinder looking plastic thing. very tiny, fits in your hand. my car would do the same work fine for months, then **** out and die and then work perfect 2 hours later. the dealer charges 200-250 for the part the auto store 100?. after installing it may act weird.. your car idoling will be off for a bit. turn it off and on for 10-20 minutes, drive it around the block if you can. turn it off again etc. until it starts to idol mormal. i think the master computer thing built in it has to reset itself since you disconnected the battery earlier and have just installed a part tht requires electrical contact. my car does that when i replaced it twice already but then resumes to normal. try this option and see if anything happens, if not return the part and get your money back.

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