Possible Vacuum Leak? - ZR-1 Net Registry Forums

KJL · 09-25-2019

I have a 1995 that runs strong. I noticed the other day when the hood was open that after I turn the car off I heard a hissing sound for a few seconds coming from under the intake (of course....). I don’t recall ever hearing that before. The car doesn’t seem to do it if I start it only for a minute then turn it off. Running the ignition on with engine off vacuum pump test indicates no issues with at least that part of the vacuum system.

09-25-2019	#1
KJL Join Date: Mar 2013 Location: Roswell, GA Posts: 234	Possible Vacuum Leak? I have a 1995 that runs strong. I noticed the other day when the hood was open that after I turn the car off I heard a hissing sound for a few seconds coming from under the intake (of course....). I don’t recall ever hearing that before. The car doesn’t seem to do it if I start it only for a minute then turn it off. Running the ignition on with engine off vacuum pump test indicates no issues with at least that part of the vacuum system. __________________ 1995 ZR1 #159 Ported,Corsa,4.10 Rear, Dual Disc RAM Clutch, Alum Flywheel, Haibeck Chip, ZFDoc Plates, Relocated Battery 400 rwhp 1992 ZR1 #280 Ported, Locked Secondary's, Flowmaster Exhaust, Haibeck Chip, 375rwhp 1996 Collectors LT4 (Stock) 1972 Convertible 434 Small Block 572 rwhp