I am having the same issue. I have a 97 with 30,000 miles. Misfire 1&4. I have replaced the MAS and swapped coil packs. I can drive for months with no issues until I wind it out pass 6,000 close to redline. I did the 30,000 mile tune up two years ago and did it again hoping it would fix the issue. I am not that hard on it very often so its not that bid of an issue. However, I would love to know what to do to fix it without keep doing part swaps.
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