Cold whistling vacuum leak 07 Liberty passenger firewall area.

[michael mehle]

Hello again. Winter's coming. Only during the cold Minnesota winter do I hear a vacuum leak coming from the passenger side firewall area under the hood. Soon as the engine warms it's gone. Any ideas? '07 Liberty. TIA

 

[burntkat]

Hello again. Winter's coming. Only during the cold Minnesota winter do I hear a vacuum leak coming from the passenger side firewall area under the hood. Soon as the engine warms it's gone. Any ideas? '07 Liberty. TIA

Sounds like a broken hose in the vacuum motor. A good way to find this would be to invest in or build a smoke pot.

Been looking at this one, myself. It doesn't need to be expensive. I've built them out of paint cans and an old tee shirt before, but those never seem to last. https://a.co/d/2ZuxtgD

Basically, it's a big-ass ******-flute. Same exact concept, bigger scale.

Once you have found the leak (most likely a vacuum line), it's your choice if you want to replace the line, or' temporarily fix' it with ADHESIVE LINED (caps because important!) heat shrink shrunk around the old hose.
My last 'temporary fix' is about 25 years old.

 

[michael mehle]

Sounds like a broken hose in the vacuum motor. A good way to find this would be to invest in or build a smoke pot.

Been looking at this one, myself. It doesn't need to be expensive. I've built them out of paint cans and an old tee shirt before, but those never seem to last. https://a.co/d/2ZuxtgD

Basically, it's a big-ass ******-flute. Same exact concept, bigger scale.

Once you have found the leak (most likely a vacuum line), it's your choice if you want to replace the line, or' temporarily fix' it with ADHESIVE LINED (caps because important!) heat shrink shrunk around the old hose.
My last 'temporary fix' is about 25 years old.

Thank you for the info.