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8 Series - E31 (1989 - 1999)

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  #1  
Old 11-29-2011, 11:45 PM
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Costa Costa is offline
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Mein Auto: Supercharged E34 540i6
850i - Running rich

Okay, so I'm planning on buying an 850i off craigslist hopefully in the next month if things go well money-wise. Anyways the guy selling the car just tried to get it aircared (smog test) and it failed because the passenger side of the car is running really rich, he's changed the O2 sensor and all the intake gaskets on the engine. Could this be an electrical problem? Any suggestions in to why it is would be great. And also, he doesn't have the middle dash, the obc screen, how hard is it to get one, and how much is it going to cost? Thanks
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  #2  
Old 11-30-2011, 06:36 PM
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  #3  
Old 12-01-2011, 04:31 AM
TxGr8White TxGr8White is offline
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Mein Auto: BMW 850Ci
Mass Airflow Sensor, DK motors needing cleaning and rebuilding
I would start with these two things first.
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  #4  
Old 12-01-2011, 03:03 PM
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Quote:
Originally Posted by TxGr8White View Post
Mass Airflow Sensor, DK motors needing cleaning and rebuilding
I would start with these two things first.
Okay, I understand the mass airflow sensor, but what are the DK motors, sorry lol
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  #5  
Old 12-01-2011, 03:06 PM
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drivinfaster drivinfaster is offline
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throttle motors.

what were the readings of the gasses?? rich indicator is co, while hc is an indication of misfiring. if they do a nox test, then that would indicate cats as there are no egr valves on the m70.


df
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  #6  
Old 12-02-2011, 06:34 AM
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Mein Auto: Supercharged E34 540i6
Turns out to be a faulty cat, but I'm not buying this car anymore, it's nice and all but it's a 4 speed
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  #7  
Old 12-03-2011, 04:09 PM
TxGr8White TxGr8White is offline
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Quote:
Originally Posted by cmellios16 View Post
... it's nice and all but it's a 4 speed


...with little effort is is a very fast 4-speed...
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Black 1993 850Ci - 125,508 miles
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