id like to start off by saying hello to everyone as i am new to this forum...

i drive a 1997 audi a4 1.8 20v that has done 105k miles, its in kingfisher blue.
the car is totally standard factory spec, apart from eibach lowering sport springs.

ive owned the car for approximately 6 weeks now and it is returning 10 miles to the gallon, i.e it is doing 35miles to a quarter tank of fuel...

i had the car fault codes read, which were,

[color=#FF0033]throttle valve fault - ive been told to try cleaning first..i havent got round to doing this yet...

mixturer adaption above limit - i dont know what on earth this means....

temp sensor defect - ive replaced the temperature sensor..

faulty thermostat - ive replaced the thermostat...

ive also replaced the o2 sensor, the one on the front, near the exhast manifold.

all parts that have been used are brand new and are audi spec parts.

before changing the parts the car did run rough at idle, it is slightly better now. also the car is throwing alot of water out of the exhaust.. there is no black smoke though..it has been serviced, i.e oil filter, oil, air filter, spark plugs.

please please help me if you can as i dearly love my audi and really want to keep the car as it is in immaculate condition, however with fuel consumption that bad i cant afford to....

many thanks and all help will be greatly appreciated...