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Dealer says compression fine. Other guy says vacuum low.... If the compression wasn't low it could be a burnt exhaust valve. The only way to confirm for sure is leakdown test. Not many "new age" techs are versed in old school engine diagnostics like the all important vacuum gauge. I've seen a coil be an issue before on an frs. My buddies that recently blew up lol. Personally Check fuel pressure. Check compression compared to other cylinders then leak down test.
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