How to troubleshoot engine vacuum leaks in an Audi 80?

I've noticed a decrease in power and increased hesitation while driving my Audi 80. I suspect it might be due to a vacuum leak in the engine. How can I confirm and locate the specific leak?

To confirm if a vacuum leak is causing your issues, try spraying carburetor cleaner around suspected areas while the engine is running. If there is a leak, the idle speed will change.

Once you've confirmed a leak, check all hoses and connections for cracks or loose fittings. Consider using a smoking machine for harder to find leaks.

Common areas for vacuum leaks in Audi 80s are the intake manifold and throttle body gaskets, as well as the vacuum line that connects to the brake booster.