So in tracing a vacuum leak I disconnected the vacuum reservoir (#5 in the picture below), when giving it a shake there is a rattle coming from inside the reservoir box. Is there a way to test that the reservoir is working properly? What does the reservoir do exactly? And where can I find a replacement if needed?
2003 Jeep TJ, 4.0 I-6.
2003 Jeep TJ, 4.0 I-6.