Emissions Problem

[kentish]

Hi to everyone.

Just got result of an emission test done on my car today at a friend place.

Here are the result.
Car has no calytic converter.

CO% Vol :5.53
HC ppm Vol h : 304
CO2 % vol : 11.8
O2 % vol : 0.53

Lambda 0.865
No PPM vol : 75

Car is a 540iA 1994 withou calytic converters. None were fitted to the car. Its South African model.

what you guys think of that? my friend told me that am running a bit rich with 0.865 Lamda and the CO& is out of range completely because no catalytic converters are present.

Could it be spark plug giving that rich lambda

Thanks
Kentish
540iA 1994
Mauritius

[Tiger]

Whoa.. that's high reading... Worn spark plugs a couple of years old might be able to do that... but I would pinpoint it to O2 sensor for the biggest effect.

[kentish]

thanks for the reply. I think the car has no 02sensor cause it has no catalytic converter and as per ETK, no o2 sensor is listed for it.

Chassis number: Ba48504

Kentish
540iA

[Tiger]

Wow... no O2 sensor... then you got no way of fine tuning the mixture... looks like it is a normal operation of your car... so what's wrong with it?

[molesz]

Hmmm, isn't that CO measuring result gigabnormal even for a car with no cat???
I remember measuring results from my first car (1983. Audi 100 2.0) with no cat and a CO range was about 0,7 !
What about the fuel consumption ... ?

[Tiger]

CO is in relation to HC... the more HC you create, the more CO there is... since this car is not our typical 540i... I don't know what to think is normal...

I know my cat equipped engine only produce 7 for HC and 0 for CO on treadmill emission test