Homemade Vacuum Leak Tester - Mustang Evolution

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Old 08-29-2014, 08:08 AM   #1
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Homemade Vacuum Leak Tester

So i recently decided to go back to my stock GT manifold and intake from my Cobrajet set up, and was plagued with a phantom vacuum leak that was driving me crazy, and i finally broke down and made this nifty little device.

Basically you just burn a small cotton rag in the paint can.
Adjust air compressor to ~3-5 psi
The fitting is 5/8" so it can either be routed to the coupler for the intake i made, or any of the PCV fittings to test various parts of the system.
Apply pressure to the valve stem and smoke will blow out where your leak is.

Turns out i lost an injector O-ring during the swap -_- something that seems so trivial now, but oh well, at least its back up and running.

Also, this is why it's VERY important to have your datalogger hooked up after making major changes to the vehicle, and making sure it is running right after said changes. Hopefully this nifty little idea can help someone else in the future and save them some time and effort, i was damn near pulling my hair out trying to find this leak.
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Old 08-29-2014, 08:12 AM   #2

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I love simple cheap

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Old 08-29-2014, 09:10 AM   #3
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Great idea!
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