e36 CO2 setting or resetting the values-M3 3.2

[Peejay]

Guys I seem to have a problem with my s50b32 co2 values. The readings are to high and one can also get a strong smell for unburned fuel in the exhaust fumes.

Anyone have any advice or what should I do to fix this?

 

[S1NGH 911]

Remap/unichip :fencelook:

 

[Kish2604]

Heven, How were those CO2 values tested? also what were they at? did you take the car out for a drive while testing to check values?

99% of the time the O2 sensors go bad and the mixture goes awol as thats the only way the dme advances or retards fueling.

 

[Peejay]

No we didn't take the car out. But you read them with inpa and Claude also confirmed it with he's DIS when he read the car.

P/S theses readings where done when the car was at idle

 

[Dhp507]

Do you have a decat ...........these will be more pronounced due to such. Especially from cold start due to rich condition for warming the cats up.

If this continues once the vehicle is warm I would concur with Kish though was there any faults beside the CO readings.

 

[e23]

Do you have a decat ...........these will be more pronounced due to such. Especially from cold start due to rich condition for warming the cats up.

If this continues once the vehicle is warm I would concur with Kish though was there any faults beside the CO readings.

Ditto to what Dhp said.

My car has a decat without a remap & at cold startup I due to fueling

 

[Peejay]

Yes. The car is decat. Will look at the O2 sensors. Can someone tell me where's their location

 

[Kish2604]

Heven!:fishwack::fishwack::fishwack::fishwack:

 

[Dhp507]

Mine sit on the manifold, i belive yours will be before the cats

 

[Peejay]

What manifold? Exhaust?

 

[Peter@AEW]

Where the exhaust manifold becomes almost level with the body just under the drivers feet.

Co2 levels increase with a decat however what is important to read is the adaptation values for bank1 and bank2
THey should be very close together if they are not reset them and check again....if still not you have electrical issues......if you have electrical issues good luck tracing them