Author Topic: 318is - Throttle Housing - missing hose? (Read 3389 times)

paulo · « **on:** July 20, 2009, 11:30:32 AM »

There appears to be a hose come loose/missing leaving a small pipe coming out of throttle. It's sucking in air causing engine to idle erratically. When I put my finger over it, engine runs normally.

My question is, what connects here (see photo)? There is no obvious sign of a missing/disconnected hose. Can I simply seal this off? I'm really confused as to how this became 'open' as my car has run smoothly for last 4 years. All of a sudden, this!!

tjts1 · « **Reply #1 on:** July 20, 2009, 12:22:18 PM »

You need to deal with all the vac hoses on or near the intake. There are 3 hoses that attach to the TB. Which one are you talking about.

paulo · « **Reply #2 on:** July 20, 2009, 01:15:23 PM »

Quote from: tjts1;75527

You need to deal with all the vac hoses on or near the intake. There are 3 hoses that attach to the TB. Which one are you talking about.

Thanks for reply. The nipple/short pipe I'm referring to is marked with a small red "?" in first diagram in:

http://www.m42club.com/forums/showthread.php?p=49773

In my 318is, the nipple/pipe is exposed with no obvious dangling hose come loose. Is it as simple as losing a nipple/dust cover? I've now bunged up the short pipe and engine idles sweetly. Without this, idle/engine is highly erratic. There is an obvious sucking in of air through this inlet when not closed off.

My 318is is UK spec.

paulo · « **Reply #3 on:** July 21, 2009, 09:41:49 AM »

I've posted a pic here (red circle)

http://www.bimmerfest.com/forums/showthread.php?p=4364833&posted=1#post4364833

1991 E30 M42 · « **Reply #4 on:** July 21, 2009, 08:02:55 PM »

the hose that connects there goes to the purge solenoid on top of the charcoal canister, http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=13_0205&hg=13&fg=15 (its a terrible picture on realoem) the hose that is missing is # 2

keflaman · « **Reply #5 on:** July 22, 2009, 12:30:19 AM »

Let us know how well the car idles when that pencil eraser deteriorates from the heat of your engine:eek:

I'm sure you did that as a temporary measure, but you may want to consider investing in a proper vacuum cap similar to these: http://www.holley.com/26-105.asp:D

paulo · « **Reply #6 on:** July 22, 2009, 01:51:25 AM »

Quote from: 1991 E30 M42;75633

the hose that connects there goes to the purge solenoid on top of the charcoal canister, http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=13_0205&hg=13&fg=15 (its a terrible picture on realoem) the hose that is missing is # 2

Many thnanks for the replies guys. I've now know there should be a hose connected to the solenoid/charcoal canister. However, my 318is is a UK model and doesn't seem to have a charcoal canister.

I've had no problems for 4 years and I can't work out how a hose can just come loose and completely disappear. On the other hand, how can this have been exposed all this time without vacuum problems?

Confused of London.

paulo · « **Reply #7 on:** July 22, 2009, 04:09:06 AM »

Quote from: keflaman;75657

Let us know how well the car idles when that pencil eraser deteriorates from the heat of your engine:eek:

I'm sure you did that as a temporary measure, but you may want to consider investing in a proper vacuum cap similar to these: http://www.holley.com/26-105.asp:D

Oh man, that's what I need! Thanks a bunch. Pencil eraser update. It's gone bullet hard. Gonna be interesting extracting it as it seems to have been sucked in a fair way.