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E34 (1989 - 1995)

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  #1  
Old 07-06-2013, 06:18 PM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
Mass Airflow Filter

Hey guys lately my car has been putting at idle so i decided to twist and detach the connecter from the MAF harness. Seems to run fine then. Even though i wouldn't wanna drive with it disconnected for long periods of time or at all. What's the significance with it. Last i checked they weren't cheap either. Or could it be something else?
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  #2  
Old 07-06-2013, 06:20 PM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
I know i need 02 sensor as well maybe it's a combination. Stomp test gave me 1221
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  #3  
Old 07-06-2013, 08:27 PM
N5673U N5673U is offline
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Location: Pennsboro, WV
 
Join Date: Nov 2012
Posts: 67
Mein Auto: 95' BMW 540i
I've got the same problem. My car needs a new O2 sensor so badly that I can't have the MAF hooked up or else it runs really crappy, so, the MAF is always unhooked until I get a new O2 sensor. Yeah, it idles really rough and can sometimes stall if kept in reverse for a long period of time without moving, but it's a lot better than with the MAF connected.
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  #4  
Old 07-07-2013, 05:48 AM
Mamij Mamij is offline
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Location: Denmark
 
Join Date: Apr 2007
Posts: 592
Mein Auto: BMW 320i M52 1996
You can find OEM-grade German Loewe 4 wire heated O2 sensors, with a 1 year warranty, for just $46 shipped.

http://www.ebay.co.uk/itm/Universal-...item1e7ba7dca2

Just found these while searching for myself. Makes you just want to change your O2 sensors for kicks, doesn't it ? I've done much reading, there's no point doing so until you have a problem, which might not always highlight itself through an error code unfortunately.

I might need 2 and others might need 4 (M52 engine). Better than Amazon's stuff anytime. Bosch sensors are around $90 shipped. Loewe makes AFMs for BMW and Merc, I bet anything that they make will be of a very high standard.

Unheated O2 sensors last 50k, and heated ones last 100k, from what I've read. Very good value for just $46 for parts.
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  #5  
Old 07-17-2013, 04:52 AM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
well i ordered the mass air flow sensor for about a 100 bucks. next will be the o2 sensor spark wires plugs fuel injectors. Im in the mood now to get this puppy riding like a brand new 93
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  #6  
Old 07-17-2013, 09:07 AM
imae34driver imae34driver is offline
FCK HONDA
Location: Orange County , CA
 
Join Date: Feb 2013
Posts: 2,042
Mein Auto: 1995 540i SPORT /6 spd
A vacuum leak will cuase your issues, unplugging the maf sends the car into a pre set mode with base setting and values the ecu knows will work.

This makes the car more driveable with the vac leak..

Also, cheap new chineese MAFs are know for not working FYI go bosh there at least..

I once ended up with a unplug the maf scenerio that was never solved..

6 shops, 4 master techs,400$ in diagnostic new everythings. Problem persisted..

Car was fast too like that! I modded it into a race car, gutted it..
Sold it, new owner could not find any shop to fix the maf scenerio succesfully either, he sold it and the next guy rolled it..


That was 3 owners over about 2 1/2 years no one could fix it!! Even a wire harness did not help!

It was so bad plugged in you cant get out of the parking lot , unplugged the 325i will eat us spec e36 M3s easy

I really hope you have a simpler problem, mine was a curse that never died..
Its the only issue i could never fix even money no object...
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  #7  
Old 07-17-2013, 06:53 PM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
Maf came in today replaced the old one drove around for a bit got my power back. Runs great!!
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  #8  
Old 07-17-2013, 06:54 PM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
ordered my maf from usautoparts
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  #9  
Old 07-17-2013, 08:14 PM
morrigan_aria morrigan_aria is offline
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Location: Tacoma, WA
 
Join Date: Jun 2013
Posts: 5
Mein Auto: 2000 540i
Mass Airflow Filter

How much was it? My '00 540i keeps stalling (in neutral at idle, in drive and stopped or driving). I keep getting a MAF code and we've cleaned it twice...sounds like I'm in the market!


Sent from BimmerApp mobile app
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  #10  
Old 07-18-2013, 07:37 PM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
it was a 100 bucks. seems i spoke to soon still getting low power a little i still need to order that o2 sensor still. I havent tried to reset the codes tho either i try that in the morning
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  #11  
Old 07-20-2013, 09:46 PM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
just order my Bosch 02 sensor today should be here tommorow. Hopefully it makes the surge feeling stop
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  #12  
Old 07-20-2013, 09:55 PM
imae34driver imae34driver is offline
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Location: Orange County , CA
 
Join Date: Feb 2013
Posts: 2,042
Mein Auto: 1995 540i SPORT /6 spd
If it happens before csr warms up then its not the o2
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  #13  
Old 07-28-2013, 11:36 AM
93tillInfinity 93tillInfinity is offline
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Location: St. Louis, Mo
 
Join Date: May 2012
Posts: 97
Mein Auto: 93 525i
yep its before the car warms up. Since i have the 02 sensor anyway might as well replace it since that's what the code is throwing. Cant get the old one off though may have to take to a shop or something. I put some WD-40 on it but to know avail.
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  #14  
Old 07-28-2013, 11:53 AM
BMR_LVR's Avatar
BMR_LVR BMR_LVR is offline
Humble E34 lover
Location: Asheboro, NC
 
Join Date: Dec 2008
Posts: 5,264
Mein Auto: 1992 525i
Quote:
Originally Posted by 93tillInfinity View Post
yep its before the car warms up. Since i have the 02 sensor anyway might as well replace it since that's what the code is throwing. Cant get the old one off though may have to take to a shop or something. I put some WD-40 on it but to know avail.
What you need is a good penetrant. Plain WD-40 is not a penetrant. PB Blaster is one of the better ones out there and available at any car parts store. Spray it on and let it sit overnight. Do it again the next day and try to remove the sensor on the third day.
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Most problems are usually something simple !

Quote:
Originally Posted by noego View Post
It's Deja Poo - as in, I've heard this **** before.
Steve

Calypso Red 1992 525i with 200K miles

1991 735i - Sold
1992 525i - Sold
1995 325is - Sold
2000 528i - Sold

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