Help Qwik 2001 Infiniti I30 Hissing Noise Near Spark Plug

[I30inHouston]

Hi everyone new here hope you can help! I dont see the appropriate forum so I will post my problem here in hope of a qwik response. Got a 2001 Infiniti I30 188k on it bought used. Car dealer replaced leaking valve cover gaskets now has hiss noise near coil and plug nearest to driver on the backside by throttle. When I hit the throttle under the hood I hear a whoosh noise of air sucking in somewhere as well as a continous vac leak. Searched all over and done the carb test. My coil is broke where the bolt holds it and the noise sounds under there. Maybe they didnt seat the plug right? The noise is continous. My best guess is to try and pull the plug and sew. Anyone seen or heard this! Thanks in advance!

[PapaSmurf2k3]

Yeah sounds like either a vacuum leak, or a loose spark plug. The carb cleaner/starting fluid test didn't result in any findings?