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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 06-24-2014, 07:03 PM   #1
wallofgrath
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Join Date: Jan 2012
Location: Stamford, CT
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My Ride: 2001 330Ci
What vacuum hose is this / where does it connect?

*SOLVED* It connected to that black plastic vacuum canister. The canister had the vacuum hose for the fuel pressure regulator plugged into it!!

I have been troubleshooting a crankshaft sensor CEL, and found this random rubber vacuum hose (it was dangling lower but I pulled it up for the photos) ... what should it be connected to?
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Last edited by wallofgrath; 06-26-2014 at 10:25 AM.
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Old 06-25-2014, 06:27 PM   #2
wallofgrath
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Location: Stamford, CT
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Anyone? It comes out of the top right of the driver side of the engine (closest to the steering wheel, facing the strut mount). I can't find anywhere to connect it!

Last edited by wallofgrath; 06-25-2014 at 06:28 PM.
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Old 06-27-2014, 09:34 PM   #3
Netrun
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Join Date: Jun 2014
Location: Detroit
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My Ride: e46 330i
Have same hose loose in engine bay

Quote:
Originally Posted by wallofgrath View Post
*SOLVED* It connected to that black plastic vacuum canister. The canister had the vacuum hose for the fuel pressure regulator plugged into it!!

I have been troubleshooting a crankshaft sensor CEL, and found this random rubber vacuum hose (it was dangling lower but I pulled it up for the photos) ... what should it be connected to?

Hey there, I think I have the same loose hose in engine bay, crazy I know. You say its solved - the hose connects to "that black plastic vacuum canister", but I have NO idea what you mean by that. What canister? Where?

Thanks in advance for any help you can provide.

Net
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Old 06-29-2014, 08:57 PM   #4
wallofgrath
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Join Date: Jan 2012
Location: Stamford, CT
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My Ride: 2001 330Ci
The bracket to the canister is broken on my car so it just dangles in the general area of the picture I posted. But I believe it is supposed to bolt to the side of the engine block, right below the vacuum hose that I circled in red. The canister is black plastic, cylinder shape.. I guess you could compare the size and shape to an oil filter.

Last edited by wallofgrath; 06-29-2014 at 08:57 PM.
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Old 07-01-2014, 09:32 AM   #5
Netrun
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Hmm

Ok, thanks. I believe that piece you are describing is part of the fuel system. I checked, mine was plugged in.

I tore apart my car looking for vacuum ports missing a hose, this is what I found (in case it helps anyone else):

Back of intake manifold on driver's side has 3 ports: 2 are 1/8" inner dia., last one is quite a bit bigger. This 3rd port is plugged on my manifold.

One of the vacuum ports goes to the one-way valve and then on to the electric switch that controls the SAP (secondary air pump).

One of the vacuum ports goes to the fuel thingy located in betwen the CCV and the intake boots to the throttle body.

Unfortunately, I had a THIRD 1/8" inner dia vacuum lines that had nowhere to go. After much internets searching I found out that the e36 used a CCV that had a vacuum port but the e46 used a CCV without a vacuum port. My CCV had been replaced by the previous owner (who, based on circumstantial evidence, was not well-off). I decided that a e36 (previous generation 330i) CCV was used to replace the CCV that came with my car.

I added a 'T' on the back of my intake manifold vacuum port, plugged my extra vacuum line into it, and crossed my fingers. Two days later my SEL cleared itself and I was singing the praises of the internets.



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