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#1
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Check engine light
For the past several weeks I've been having a problem with the check engine
light on my 1999 Miata, 79,000 miles. The first time it happened was when starting after being parked for about two hours. The engine ran very rough, almost stalling, with the check engine light flashing. I checked the gas cap and fuses but saw nothing wrong. After driving about a mile, the engine suddenly started running normally, and the light went to solid. The next day I went to the dealer, who checked the code and said I need new wires and plugs. I had them do that, but the next day I had the same problem. This time the dealer said it was the catalytic converter, which was still under warranty. They changed that, but the problem recurred. The light then went out by itself after I had parked the car for two days without driving. Since then it's happened twice again. The dealer checked and said it showed the same two codes (random misfire and cat converter). After checking with Mazda, they now think it's the ignition coil pack, which is on order. Right now the car runs OK (though there seems to be an exhaust rattling which I at first thought might be the cat heat shield) and the check engine light is on solid. A possible contributing factor is that back in October the car got partially flooded - parked in an area that turned into a giant puddle, and ended up with about an inch of water in the foot wells. It ran fine, though, and a different dealer told me at the time that the water shouldn't cause any problems (main concern was getting the carpet dried out properly) since all the electronics are up high. Any ideas about this? Barry |
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#2
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Check engine light
"Barry" > wrote
> After checking with Mazda, > they now think it's the ignition coil pack, which is on order. The '99 coil packs are known problems . I think it's likely your dealer has identified it properly. Let us know how it works out. -- Ken Lyons '97 Brilliant Black/'90 Classic Red Inside the Beltway [Remove the first two digits to reply] |
#3
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Check engine light
> A possible contributing factor is that back in October the car got
partially > flooded I had symptoms similar to yours after buying my 95 this winter - the dealer had washed the engine and there was water in the spark plug wells. Pull your plugs, dry it out, and then let the car sit a bit with a warm engine and the plug wires pulled to allow any moisture to evaporate. My check engine light came on with the problem, but I don't know what codes were involved. What's more, after three months, it went back out by itself - I didn't have to pull fuses, etc. |
#4
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Check engine light
> Pull your plugs, dry it out, and then let the car sit a bit with a warm
engine and the > plug wires pulled to allow any moisture to evaporate. Sorry, meant to say "pull your plug wires", not the plugs themselves. You just need to get the moisture out from being trapped in the plug wells. miker |
#5
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Check engine light
>> After checking with Mazda,
>> they now think it's the ignition coil pack, which is on order. > > The '99 coil packs are known problems . I think it's likely your dealer has > identified it properly. Let us know how it works out. It looks like the problem is finally resolved, and it was the coil pack. However, it took a while for this to become clear. A few hours after the dealer replaced the coil pack, the check engine light came back on, but without the roughness that I had experienced earlier. It turned out that the catalytic converter had to be replaced again, because the ignition problems with the bad coil pack ruined the cat (for the second time). |
#6
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Check engine light
"Barry" > wrote
> It looks like the problem is finally resolved, and it was the coil pack. Thanks for the follow up, Barry. It's always nice to know how thing turn out (and get affirmation of my wild-ass opinions). Glad it worked out for you. Sounds like you have a decent dealer there. -- Ken Lyons '97 Brilliant Black/'90 Classic Red Inside the Beltway [Remove the first two digits to reply] |
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