Vacuum leak? Marc has me confused now! - ZR-1 Net Registry Forums

KILLSHOTS · 04-19-2014

Hey guys,

My vacuum pump (under the pass. headlight) cycles on for a moment every 4 to 5 seconds, when the ignition is on with the car not running. I've come to understand that this indicates a vacuum leak somewhere under the plenum. A no-brainer, right?

BUT, on page 19 of the latest HOTB, Marc says in his troubleshooting tips:

"If the pump cycles on and off the vacuum connections up to the secondary port solenoid are tight. As long as the pump will turn off for one second, the secondary port throttles will operate normally. If the pump shuts off for longer than five seconds it indicates that the vacuum system connections are tighter than average."

So, according to Marc, my vacuum system connections are tight? Am I misunderstanding what I've just read? Anybody willing to help confuse me further?

Thanks!
Chris

04-19-2014	#1
KILLSHOTS Join Date: Feb 2014 Location: AZ Posts: 860	Vacuum leak? Marc has me confused now! Hey guys, My vacuum pump (under the pass. headlight) cycles on for a moment every 4 to 5 seconds, when the ignition is on with the car not running. I've come to understand that this indicates a vacuum leak somewhere under the plenum. A no-brainer, right? BUT, on page 19 of the latest HOTB, Marc says in his troubleshooting tips: "If the pump cycles on and off the vacuum connections up to the secondary port solenoid are tight. As long as the pump will turn off for one second, the secondary port throttles will operate normally. If the pump shuts off for longer than five seconds it indicates that the vacuum system connections are tighter than average." So, according to Marc, my vacuum system connections are tight? Am I misunderstanding what I've just read? Anybody willing to help confuse me further? Thanks! Chris