Exhaust leak check?

[7dswinger]

Whats the best way? I think there may be a leak somewhere before or around my O2 sensor but I can't tell.

 

[66plyValiant]

have someone at the tailpipe cover the pipe with a rag, it will still allow air to flow out but it will put pressure on the leak making it easier to hear

all this is to be done at idle

 

[1980volare]

evap smoke machine, feed the smoke through the tail pipe. easiest way.

 

[67Dart273]

Easy. Get yourself a scrap piece of hose. 3/8 fuel line, etc, works fine. Hold it NEAR your ear and probe around. I will GUARANTEE you that when you come across the leak, you will hear it.