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8 Series - E31 (1989 - 1999)

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  #1  
Old 01-26-2011, 08:27 PM
pinto096 pinto096 is offline
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Mein Auto: 1991 850ci
Burn my eyes when my 1991 e31 idles

i turn my car on and the car idles a fume cmoes out and my eyes burn like amonia what can cause this bad fuel mixture ps check engine light is on maybe same or seperate issue
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  #2  
Old 01-27-2011, 08:41 PM
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drivinfaster drivinfaster is offline
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probably running rich, but if the light is on get the code(s) pulled. that would give you an idea as to the direction to go.


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  #3  
Old 01-27-2011, 09:02 PM
TxGr8White TxGr8White is offline
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Mein Auto: BMW 850Ci
possible fuel leak at the rear of the engine at firewall, also any other fuel line location under the hood. Check the VCV valves, as well as the two breather valves and charcoal canister on the passenger side of the engine.
A Stomp test will give you the fault codes - that is a good starting point.
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  #4  
Old 03-06-2011, 07:56 AM
H2887 H2887 is offline
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Mein Auto: 91 850 01z3mrdstr
Same problem for some time .what can you do with the FCC and breather valves? Are these replaceable?and if so what are the part numbers?
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Old 03-06-2011, 09:04 AM
pinto096 pinto096 is offline
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Mein Auto: 1991 850ci
never fixed the problem but driving the car everyday seems to diminish the fuel problem of course it may be an emission problem mixture problem tune up etc a start would be to make sure you have no codes embeded in the computor once everyhthing is clear and functionin than you go from there trying now to clear my codes fix one thing 2 more pop up as many said if you purchase a car with no mainteneance history be ready to shell out bi bucks
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Old 03-06-2011, 09:13 AM
TxGr8White TxGr8White is offline
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Old charcoal canister will also cause the fuel smell.
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  #7  
Old 12-25-2011, 09:27 PM
MJaye MJaye is offline
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Mein Auto: 996, E31X2 69Camaro
Will this be the canister or the media inside? I was thinking to reuse the canister after cleaning it thoroughly and changineg out the charcoal.
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  #8  
Old 12-26-2011, 08:41 AM
TxGr8White TxGr8White is offline
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It is the media inside. Canister can be reused. There is information in the archives over at BimmerForum that details the procedure. Basically you need to get some activated charcoal granules (pet store - aquarium section) and use that. This is a very inexpensive way to do this, as the new canisters are a bit pricey. On the other hand, they usually last a very long time.
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  #9  
Old 06-03-2012, 12:36 PM
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BigBoy740il BigBoy740il is offline
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Mein Auto: 1989/1991 E30; 2000 E38
You need to first start with the engine codes and check for vacuum leaks. I'm positive the fumes are from the engine running rich. What is your engine's idle speed (cold and warm). Check all air bellows and vacuum hoses for leaks or cracks. Check fuel pressure regulator, and engine vacuum readings. Check the condition of your gaskets..... Valve covers, valve cover half moons, oil fill cap, oil dip stick, oil pan. These engines are very sensitive and any additional unmetered air throws off the air fuel mixture.
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