The vacuum lines themselves are rarely the problem. It's most often the connectors. The rubber cracks and expands and allows leakage. A very small leak can cause huge problems. That's where I would start.

I generally grab some good connectors when I'm at the junk yard so I've got spares when needed.

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica