What the Libra zodiac sign is all about: Libra is the seventh of the 12 zodiac signs, which begins its cycle in early fall every year during Libra seasonâwhich falls around September 23-October 22.
How it works. This schematic shows the component parts of a typical leak-down tester. The gauge on the right is held at a standard pressure by adjusting the pressure regulator while the gauge on the left shows an example reading of 85-or 15% leakage.
The canister purge solenoid valve also serves as a diagnostics tool used to troubleshoot the emission system. The valve is able to be manually shut to test for leaks in the system. The canister purge valve is difficult to diagnose since its failure can cause other sensors from the emission system to malfunction.