Vaccuum Leak - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 06-16-2004, 02:42 PM
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How can I tell if my car has a vaccuum leak??

<u>1995 BMW 325is</u>

- //M3 Spoiler
- 15% Tinted Windows
- Front License Plate Delete

If I say something stupid, it's probably cause I'm ripped
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#2 (permalink) Old 06-16-2004, 03:27 PM
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Hissssing noises r a big clue

use a can of starter spay(carb cleaner works too) and MIST, dont hose down, the area u wish to test. for example if u want to check for craks in a vaccume hose, lightly spray the hose w/ur car running in idle. when u spray, step back and listen to the engine/RPM'a for a change/rise in sound. if the rpm's rise, u found ur problem. if no change, then keep searching.

the hose connections where the hose clamps begin to crack up sometimes, so there can be hard to find cracks after a while.
Good luck
Mark
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#3 (permalink) Old 06-16-2004, 03:51 PM
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I feel like an idiot asking this, but where is the vaccuum hose located?

<u>1995 BMW 325is</u>

- //M3 Spoiler
- 15% Tinted Windows
- Front License Plate Delete

If I say something stupid, it's probably cause I'm ripped
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#4 (permalink) Old 06-16-2004, 07:02 PM
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If you have a 318i then the hose behinde you engine up near the cowl piece has a tendancy to crack, also the hose going from your FAMS to your engine is also one that likes to crack. If they are cracked you should be able to see it, but you may have to check both sides of the hose. Also you may get an engine code from a vacum leak.
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