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how do you check for vacuum leaks?

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Old 12-10-2007, 01:29 AM
JosephLo123 JosephLo123 is offline
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Default how do you check for vacuum leaks?

how do you check for vacuum leaks? can anyone help? bone33 if your reading this, how would i check for leaks?
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Old 12-10-2007, 03:21 AM
03neonRT 03neonRT is offline
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Default RE: how do you check for vacuum leaks?

The easiest way is to buy a can of throttle body cleaner. Then, turn on the engine and spray the cleaner around the throttle body, intake, intake manifold, cylinder head, and vacuum lines. If the engine RPM increases then thats where the leak is coming from.
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Old 12-10-2007, 10:01 PM
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bone33 bone33 is offline
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Default RE: how do you check for vacuum leaks?

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ORIGINAL: 03neonRT

The easiest way is to buy a can of throttle body cleaner. Then, turn on the engine and spray the cleaner around the throttle body, intake, intake manifold, cylinder head, and vacuum lines. If the engine RPM increases then thats where the leak is coming from.
great idea. but dont do it all at the same time, or you wont know where the leak is. check your emmisions sticker on the hood or cowl fo locations of all the vacuum lines.
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Old 12-10-2007, 11:59 PM
ewetho ewetho is offline
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Default RE: how do you check for vacuum leaks?

Easiest way is with a scan tool watching fuel trim. If the trim is real high due to false air and returns a lot closer to normal at 1500-2000 RPM then you have a leak.

Then the easy way to find it is with a smoke machine.

After that MAPP gas or Propane UNLIT OF COURSE to richen the fuel mix when you find the area leaking. Or a Engine Ear or stethoscope with the metal thing off using the hose.
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