Re: low mileage

["Peter Plangger" <pepe@z.zgs.de>]

Yes it does have an O2 sensor. Sorry I forgot to post the car specs:
the car is a '91 Audi 90 2.3E non-torsen, engine-code KV, 133 HP,
145000 km. Orin also told me to have a look at the O2 sensor.
I'll keep you informed.

Thank you,
Peter

_/_/_/_/_/ pepe@z.zgs.de \_\_\_\_\_


>Peter Plangger wrote:
>>
>> Hi List,
>>
>> for half a year now my car has needed 10 percent more fuel than a
year
>> ago. This is becoming expensive. I also notice that the engine is a
>> bit rough at idle and idle varies from 800-850. The exhaust is deep
>> black inside.
>>
>> Last week I stopped by a garage to let them look for it. They told
me
>> that the emissions were so bad it wouldn't even pass the emissions
>> test. They suspected a vacuum leak or a leak in the exhaust system
but
>> couldn't find any and told be to bring the car in for 2-3 days. I
>> can't do that at the moment.
>>
>> Today I remembered that somebody had once told me that I could
check
>> for exhaust leaks by closing the exhaust end while the engine is
>> running. Ok, a friend of mine held a piece of rubber against the
>> exhaust while I laid under the car. Oooops - the engine didn't
mind.
>> Same I5-sound as usual, no effect on idle. Just a hissing sound
from
>> under the car, apperently after the catalytic converter, but I'm
not
>> sure.
>>
>> So question: Can this rise up fuel comsumption by 10%? It now needs
>> 9,5-10 litres per 100 km (premium ROZ 95).
>>
>> BTW, I once had the habit to drink a beer or two while fixing my
cars.
>> With this car I'd really have a big round belly in the meantime if
I
>> hadn't changed this.
>>
>> Peter
> Doe's your car have an O2 sensor? If so I'd check the connections
>and make sure there clean.
>
>
>John
>1990 CQ