E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > DIY: Do It Yourself

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!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 10-04-2014, 09:38 PM   #1
The Backyard 253
Registered User
 
Join Date: Oct 2014
Location: Gig Harbor, WA
Posts: 5
My Ride: 2002 Ford F350
I need help!




So I am new to BMW's and not completely familiar with all of their idiosyncrasies. That being said, I inherited a 2002 325i with 189k miles on it and an auto tranny. I brought it home on a trailer because it had a dead battery and I was told that it had quit running. So after installing a new battery I was able to start the car... kinda. It would fire and then stall. If I attempted to give it any pedal it would bog down and stall. If I cranked it while holding the pedal down, partially, it would start up and I could hold it around 3500rpm but it would bog and stall if I adjusted the pedal pressure. The CEL came on so I pulled the codes. It had a bunch of lean codes and misfire codes. After researching all of them (lots of info on this site) I decided to tear into things. I found a failed oil separator with cracked lines, a DISA valve with a broken flap, a badly leaking valve cover gasket, upper and lower intake hoses with cracks, and a fuel filter that had never been changed.

So.... I installed a new oil separator and all of the lines, a new throttle body gasket, new upper and lower intake hoses, new fuel filter, new valve cover gasket, new spark plugs, and did an oil change along with a new engine filter.

With all of this done, the car will start up and idle (although a bit roughly) but when I attempt to throttle it up it spits and sputters. It immediately throws a plethora of codes (0171, 0174, 1083, 1085, 1345, 1347, 1353, 1349, 1350). Absolutely no hesitation with the codes. They come on immediately when it is started.

So... I smoked it to see if I missed anything, to no avail. I said screw it and installed a new MAF and idle air valve. Nothing cured. I checked fuel pressure and flow and both are within spec. I am now actually considering taking it to a Euro specialist (God help me).

So I am hoping that someone on here might be able to help me out with my situation. I have looked and researched and nothing that anyone has posted has helped me to get my problem completely resolved (although the info on the oil separator was great). I was thinking about this car being my entry into the BMW life but I am really reconsidering it with the way this car is treating me.

Can somebody, anybody, help me?

(Sorry about the novella.)
The Backyard 253 is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-05-2014, 06:11 AM   #2
BDUB328I
Registered User
 
Join Date: Nov 2006
Location: Lancaster, PA
Posts: 1,496
My Ride: bmw 328i sedan (E46)
Replace disa, a broken flap will not work

Potentially useful

http://www.bimmerfest.com/forums/sho...d.php?t=738408

Also check 02 sensors
__________________

Last edited by BDUB328I; 10-05-2014 at 06:21 AM.
BDUB328I is offline   Reply With Quote
Old 10-05-2014, 08:24 AM   #3
The Backyard 253
Registered User
 
Join Date: Oct 2014
Location: Gig Harbor, WA
Posts: 5
My Ride: 2002 Ford F350
Sorry, I did replace the DISA along with all of the other parts. And I have monitored the O2 sensors and all appear to be working correctly.

On a side note... if I unplug the MAF (which is new) the car will run great and won't throw any codes except for the MAF code. Is it possible that I got a bad MAF straight out of the box?


Sent from BimmerApp mobile app
The Backyard 253 is offline   Reply With Quote
Old 10-05-2014, 09:19 AM   #4
drunk panda
Registered User
 
Join Date: Aug 2014
Posts: 3
Spray some electrical contact cleaner on the maf connection, also attempt to close the crimps in the harness connection. Poor contact could impact the low voltage signals going to the computer disrupting the amount of air it thinks it is getting.


Sent from BimmerApp mobile app
drunk panda is offline   Reply With Quote
Old 10-05-2014, 09:28 AM   #5
The Backyard 253
Registered User
 
Join Date: Oct 2014
Location: Gig Harbor, WA
Posts: 5
My Ride: 2002 Ford F350
I will try that today, thanks.


Sent from BimmerApp mobile app
The Backyard 253 is offline   Reply With Quote
Old 10-08-2014, 12:51 PM   #6
The Backyard 253
Registered User
 
Join Date: Oct 2014
Location: Gig Harbor, WA
Posts: 5
My Ride: 2002 Ford F350
So I check all of the pins in the connector. I did a tension test and cleaned them. I checked the signal while wiggling the connector and it never flinched.

Does anybody else have an idea with this one?

I know that people have mentioned issues with coils but I haven't looked that direction since it runs great if I unplug the MAF. I will add that I have monitored the O2 sensors and they are doing exactly what they should. They are tending around .3V when the MAF is plugged in and around .7V when it is unplugged.


Sent from BimmerApp mobile app
The Backyard 253 is offline   Reply With Quote
Old 10-08-2014, 05:44 PM   #7
tcphoto
Registered User
 
Join Date: Sep 2009
Location: Atlanta, GA
Posts: 1,014
My Ride: '01 325Cic TiAg
I would start at the SAP and work back through all the vacuum lines, VCG, plugs, coils to the Vacuum Control Selenoid. Then go to the other side with the airbox and back.
__________________
tcphoto is offline   Reply With Quote
Old 10-08-2014, 10:28 PM   #8
The Backyard 253
Registered User
 
Join Date: Oct 2014
Location: Gig Harbor, WA
Posts: 5
My Ride: 2002 Ford F350
I smoked it again on the air pump side and didn't see a thing. But I followed the vacuum lines with my hands just to check anyway and found the lines on the back of the intake manifold near the firewall (where they connect to the electric valve and the manifold) were in bad shape. So I replaced them and viola, it will now idle. I can rev it up (I couldn't before) but it is not perfect. The check engine light is not coming on immediately like it was before but it is showing pending lean codes. The O2 sensor readings are actually reading leaner than before (now they are sitting around .15 volts) fixing the SAP vacuum lines, with short term fuel trims at 29% on both banks!

So now what? Is it possible that the check valve (egr type thing) has a bad seal and is allowing air to leak into the exhaust when it shouldn't be, causing the O2 sensors to read lean? Or would that only allow exhaust gasses to push out?

Last edited by The Backyard 253; 10-08-2014 at 10:36 PM.
The Backyard 253 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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 On
Censor is ON





All times are GMT -5. The time now is 07:07 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use