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Old 03-06-2003, 03:45 PM
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Do A search on platinum plugs and you will find that they are not recommended fo earlier cars. I found this out a little late and I'm going to take $40 worth of brand new platinum+4's out and replace them with copper. It may be possible that the roughness is coming from a damaged lead or boot, seems to happen rather often. Once again, the search feature may give a lot of good info on that.
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