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I got a 97 Firebird and had a heck of a time trying to get it running smoothly, jackasses at Autozone sold me Platinum plugs when it takes AC Delco Iridium plugs, changed those out along with the Wires and all was well. If you got Iridium plugs then make sure a wire isn't toasted, if you got Iridiums and your wires aren't toasted then go with new ignition coils. And if it still does not work, Throw it in the Gutter and go Get Another!

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Q: 1994 Firebird is running rough. I just had the plugs changed but still having problem with it seeming to occasionally backfire What could be possible problems?
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