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Intermittent Firing Problem
Last post on Apr 11, 2012 at 8:41 PM
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What is this discussion about? Mazda MX-5 Miata, Mazda MAZDASPEED MX-5 Miata, Convertible
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#1 of 1 Intermittent Firing Problem by beemerjoy
Apr 11, 2012 (8:41 pm)
My 2001 Miata occasionally will start up and run on three cylinders - more often in warmer weather and more frequently when re-starting after the car sat for an hour or so. This usually lasts for anywhere from 1/2 to 5 miles, then all cylinders will kick in and it runs fine. Except it burns out the cat converter when it does this.Mechanics have only found the "intermittent firing problem" code when they hook up the analyzer (I knew that without hooking it up to a computer!), but no solution has been found. Compression is fairly even on all 4 cylinders. Anything from an ignition coil problem, to air flow sensor to a faulty injector has been suggested, but with all of these the question is 'why does this happen only intermittently?' A faulty injector would likely never work!
Anyone have experience with this or ideas on how to analyze further?
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