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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 09-29-2012, 02:26 PM   #1
generic
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Broken vacuum line idk what it is???

Just as the title says I have a dryrotted vacuum line that broke and I have no idea what it is. The line is located on the upper intake boot and I have included a pic, any references and answers are greatly appreciated. Cost to fix/ difficulty level bonus points thank you so much. The line in question is the bottom line on the fitting going into the upper intake boot.
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Old 09-29-2012, 06:36 PM   #2
j_block
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I think that goes to your secondary air pump. But I'm not sure

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Old 09-29-2012, 08:06 PM   #3
sfcjetjr
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Goes to fuel pressure regulator on the fuel filter.
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Old 09-29-2012, 08:38 PM   #4
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So proper would be to replace the line...and on yours, I'm not sure if it meets a hard vac line or not...but you could just splice in a new section of hose with some barbed nylon couplings you'll find in any hardware store and worry about the rest of the line later at your convenience. If it's just the end, snip it off and see if you have the room to just reconnect it ...there might be play in it...and then you'll have time, as I said, to repair it at your leisure.

I dabbed some rtv on one of my little cracks and it actually held for 2 years! LOL

Oh, realoem.com for PN for everything, but you could, if you needed to, just snip off or measure a section of hose and get something comparable at local auto store. It's just an air hose...and that one...the small one, does go to the FP regulator, which on yours is on the fuel filter...which in above a panel that's below your driver's seat...on bottom of car.
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Old 09-29-2012, 11:19 PM   #5
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Thank you so much will be taking a look at it tomorrow and see best option, will that line being broken give me any lean codes or affect my mpg?

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Old 09-30-2012, 03:24 PM   #6
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Goes to a plastic like line behind motor to a silver vacuum canister on pas side front

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Old 10-01-2012, 12:36 AM   #7
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Quote:
Originally Posted by sfcjetjr View Post
Goes to fuel pressure regulator on the fuel filter.
x2 Just remove the rubber vaccum line and install 2" of 6mm line to the fitting and plastic tubing...

Last edited by TrippinBimmer; 10-01-2012 at 12:37 AM.
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