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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 02-11-2009, 04:30 AM   #1
JacksonY
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golf tee mod

out of curiousity... If one were to do the golf tee mod and failed to plug the vacuum line... What would happen?
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Old 02-11-2009, 04:38 AM   #2
Rayce185
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Just use a screw. That way it's more secure

I would guess is the tee drops out, the valve stays closed. But I'm only guessing here.
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Old 02-11-2009, 04:43 AM   #3
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hmm yea... that's fairly straight forward... but I am curious as to what would happen if I didn't plug it properly

The valve isn't affected if the vacuum line isn't plug... but I read somewhere about vacuum leak so I was hoping someone can explain... Thanks in advance
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Old 02-11-2009, 10:07 AM   #4
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Yep, just a vac leak. Just plug it, zip tie it, and go. I've had the same screw in mine for over 2 years.
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Old 02-11-2009, 06:32 PM   #5
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Sorry to thread jack but where does that vac line come from? i tried to source it but i lost it somewhere. lol.
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Old 02-22-2009, 12:41 AM   #6
JacksonY
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Sorry to thread jack but where does that vac line come from? i tried to source it but i lost it somewhere. lol.
Thats what I wanna know too...

Just really curious what are the effects of a vacuum leak....
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Old 02-22-2009, 09:16 AM   #7
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Thats what I wanna know too...

Just really curious what are the effects of a vacuum leak....
These cars only have one source of vaccum and that's the engine. The effect of failing to plug the vacuum line at the exhaust is the same as if you had a cracked intake boot or any other vacuum leak. A vacuum leak means unmetered air is entering the engine (ie, air is sucked in after the MAF sensor). You could potentially experience lean misfires and rough idle on cold startups. Just plug the line.
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Old 02-23-2009, 03:54 AM   #8
JacksonY
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These cars only have one source of vaccum and that's the engine. The effect of failing to plug the vacuum line at the exhaust is the same as if you had a cracked intake boot or any other vacuum leak. A vacuum leak means unmetered air is entering the engine (ie, air is sucked in after the MAF sensor). You could potentially experience lean misfires and rough idle on cold startups. Just plug the line.
Lovely... Thank you!
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