318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Misc

Notices

Misc Does not fit in any of the forums below.

.
» Recent Threads
OMG!OMG!
Today 08:53 AM
Last post by Kathylaf
Today 08:53 AM
0 Replies, 143 Views
FS: Racing Dynamics RGR...
05-24-2024 03:29 AM
Last post by 7Senna8
05-24-2024 03:29 AM
0 Replies, 1,017 Views
My 318ti build
05-21-2024 04:48 PM
Last post by Jclare318ti
05-21-2024 04:48 PM
0 Replies, 1,479 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 01-12-2024, 05:37 PM   #1
KevinsDriveway
Junior Member
 
Join Date: Jan 2024
Location: germany
Posts: 2
iTrader: (0)
Unhappy Vacuum problem??

Hello guys, this is my first post on the 318ti forum and please forgive me for my english, because i am a german potato...

So 6 months ago, I bought an automatic 1997 318ti e36 with an M44 with 250tkm or 155 thousand miles. Everything worked great, no problems, changed some gaskets and the car was running smooth. I went to school and on the drive home I noticed a loud hissing noise arround the engine bay. I've lost nearly all the power and the car had big problems while running. When I gave is gas slow and steady its okay til like 2500rpm but if its on idle and i press the gas fast, it has like hick ups and stalls.

I am not a guy that knows much about cars but I got my compact to learn from it. And after watching a lot of videos, I often read 'vacuum leak' so I thought maybe this will be it. I don't know how to test and locate a vacuum leak, I also don't know for sure if this is the problem.

Maybe someone had similar problems and can help me solving it. I appreciate it!!
KevinsDriveway is offline   Reply With Quote
Old 01-16-2024, 03:36 PM   #2
two30grain
Member
 
Join Date: Sep 2015
Location: MD
Posts: 35
iTrader: (0)
Default

the most sure fire way to find a vacuum leak is to do a smoke test. You have to have a smoke machine though.

The place I would check first would be the rubber intake boot. Usually massive vacuum leaks come from here. After the airbox (where the air filter is located) check for any obvious holes. Boots often have ridges where cracks can hide.

Good luck and I hope this wasn't too late.
two30grain is offline   Reply With Quote
Old 01-20-2024, 05:13 PM   #3
KevinsDriveway
Junior Member
 
Join Date: Jan 2024
Location: germany
Posts: 2
iTrader: (0)
Default

First of all, thank you for the answer.
So, I don't have a smoke machine, and the boot I already checked, but it seemed in really good shape and I didn't saw anything odd.
I think my next step is to start the engine and spray some brake cleaner on the connecting parts from the intake after the MAF, to the engine and watch the rpm
KevinsDriveway is offline   Reply With Quote
Old 01-25-2024, 05:11 PM   #4
two30grain
Member
 
Join Date: Sep 2015
Location: MD
Posts: 35
iTrader: (0)
Default

good luck!

youll want to check every line that comes leads away from the the intake after the MAF sensor, some of it depicted here on realoem:
https://www.realoem.com/bmw/enUS/sho...diagId=11_6122

youll also want to check the hose going to the brake booster and the booster itself. if you dont find anything blatantly obvious (the ecu can compensate for minor leaks) you might want to go back to checking basic stuff like fuel delivery, spark, etc.

I'd also refrain from spraying rubber parts with brake clean. It'll dry the rubber out and cause more issues down the road.
two30grain is offline   Reply With Quote
Reply

Bookmarks

Tags
engine , vacuum


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Missing Vacuum hoses? surechap Engine 5 09-16-2014 02:37 PM
Extreme Condensation From Defrosting Vents Problem Lbcnu24 Maintenance 4 10-01-2013 10:42 PM
NO crank problem.. AGAIN! :( dhong089 Electrical 30 05-30-2011 07:59 PM
SAP (Secondary Air Pump) Repairs cali-ti Knowledge Base 5 01-23-2010 11:10 PM
Turn Signal / Indicator / Blinker Problem wasabinuki Electrical 9 04-12-2007 04:52 PM


All times are GMT +1. The time now is 03:46 PM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2024, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 69.53 k/81.08 k (14.25%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.