Only time I ever heard of a "puff puff" sound associated with plugs is when plug worked loose and compression was leaking out around or through it. Is it possible he may not have properly installed one of the new ones?
Johnny
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Pearl '92 LS-L 179K (Historic 1st 5-speed SVX)
Mods: 5-speed, 4.11's, Group-N motor mounts, dual Magnaflows, cone air filter, Kenwood MP-228 CD/Receiver, white-faced gauges, '97 grill, custom window tinting.
Ebony Mica '92 LS 80K Oct 2002 - Dec 2004: Victim of theft. She served me well.
You can tell the lack of craftsmanship by the wrinkles in the duct tape.
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