1995 525i Vacuum Diagram? - BMW Forum - BimmerWerkz.com
5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 12-19-2004, 07:47 PM
1st Gear Member
 
Join Date: Dec 2004
Posts: 207
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Deuce is an unknown quantity at this point
(Thread Starter)
Thumbs up

used

So I've got a 1995 525iT (m50 motor) and it has decided to start hesitating off idle, and sometimes at idle. I've put new plugs in it, checked the MAF (clean) and it's not throwing a code (ck engine, svs eninge all dark) that I can tell. I also changed the plugs for good measure, but no luck.

I'm thinking its a vacuum leak somewhere, and I have at least one idea where the problem is. The intake tube (between MAF and throttle body) is cracking where the auxiallry lines (I'm assuming is block vent and EGR return) come un on the under side.

Beyond that, I'm having trouble locating other vacuum lines and can't find any info in my manual (Bently, I think) where other vacuum lines are. ghead

I'm going to pick up a new fuel filter tomorrow, as well as that intake tube. Hopefully it's not that my fuel pump is on the way out, but that could be a possibility.


2002 BMW 530i
1997 Ford Mustang GT
1995 Honda VFR 750 (For Sale)
1964.5 Ford Mustang
The Deuce is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 12-20-2004, 04:55 PM
1st Gear Member
 
Join Date: Dec 2004
Posts: 207
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Deuce is an unknown quantity at this point
(Thread Starter)
Any opinions on wether my problem might be related to the following parts?

air bypass valve

idle-air stabilizer

I don't have my manual in front of me to see if either part (or something similar) is even applicable to my model, but I put the intake tube on and it helps a little, but it's not good.

I am still hopeful that there is something I can identify as the issue and get this taken care of without sending it in to the shop. Neither of my other vehicles is quite prepared for the sub-freezing tempatures right now.

I'm still going to swap the fuel filter tonight for good measure. Here's hoping I don't drink too much gas.

2002 BMW 530i
1997 Ford Mustang GT
1995 Honda VFR 750 (For Sale)
1964.5 Ford Mustang
The Deuce is offline  
#3 (permalink) Old 12-20-2004, 08:18 PM
1st Gear Member
 
Join Date: Dec 2004
Posts: 207
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Deuce is an unknown quantity at this point
(Thread Starter)
In what appears to be an ongoing saga, I have yet another hypothesis on this car.

Based on a conversation with a friend who's a better mechanic than I, he suggested that the MAF might be dead, but not tripping the light. I decided to test this theory by unplugging the MAF and running the car.

It runs the same wether the MAF is hooked up or not. It will idle fine, but hesitate when I give it gas, but will hold rpm on slight throttle. The vacuum "Test" showed no leaking when I sprayed the carb cleaner, so I'm going to limp over to Advance in hopes there is a stored code somewhere.

Is there something I'm missing here? Or am I doing what anyone else here would to troubleshoot and that's why I'm seeing views, but no responses?


2002 BMW 530i
1997 Ford Mustang GT
1995 Honda VFR 750 (For Sale)
1964.5 Ford Mustang
The Deuce is offline  
#4 (permalink) Old 12-20-2004, 08:39 PM
5th Gear Member
 
billB's Avatar
 
Join Date: Aug 2004
Location: New Jersey
Posts: 1,635
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute billB has a reputation beyond repute
Send a message via Yahoo to billB
The Deuce

I went through this vacuum leak saga last summer. This is how I did it with a help of a friend on this forum:
looked all over these one by one looking for leaks:
A. Thick ICV hose by the intake.
B. The Crack you mentioned at the boot.
C. Canister to purge valve to intake (hoses).
Everything checked fine except 2 empty cans of carb cleaner at the valve cover. Nothing. OK. The problem was at A. Oil filler cap B. when the whole base of oil dipstick came off the engine with the dipstick in it. Go figure!
billB is offline  
#5 (permalink) Old 12-20-2004, 11:29 PM
1st Gear Member
 
Join Date: Dec 2004
Posts: 207
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
The Deuce is an unknown quantity at this point
(Thread Starter)
Thanks billB.

I'm going to pull the plastic cover off the head to see if I can't get a better seal from the oil cap, and I'll check the dipstick tube.

2002 BMW 530i
1997 Ford Mustang GT
1995 Honda VFR 750 (For Sale)
1964.5 Ford Mustang
The Deuce is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 5-Series (E12,E28, E34, E39, E60)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
vACUUM DIAGRAM? BImmerN2B 3-Series (E36) 1 09-28-2005 11:40 PM
1995 525i Reliablity roydoxey 5-Series (E12,E28, E34, E39, E60) 0 12-23-2004 11:16 PM
1995 BMW 525i window problems danutuc 5-Series (E12,E28, E34, E39, E60) 2 08-22-2004 12:58 AM
1995 525i Wheel Vibration sooraj 5-Series (E12,E28, E34, E39, E60) 10 06-16-2004 04:59 PM
E30 vacuum diagram benjaminaco Bimmer Talk/Motorsports Talk 1 05-19-2004 04:31 AM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome