Vacuum leaks can be intermittent. A gash in a hose might just need the right twist of the motor in order to spring a small leak. Did you do a thorough check of all the vacuum lines? Wiggle and spray lol
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1986 Honda VFR750 - 89.3HP to the wheel
2000 Trans Am M6 - Mods: Yes.
2018 Durango R/T - AFE Intake, JLT Catch Can, Stainless Works Catback, Vinyl Dodge Racing Stripes
2003 Toyota Matrix XRS M6 - Injen CAI, Borla Muffler, TC Wheels, Rear Sway Bar
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