new to site, new to audi

[dalep2006]

Could anybody give me a bit of advice pretty please

Ive had my audi a4 1.8t sport for a couple of weeks now and after about 10 days of driving the engine management light came on
i bought it private so have no warranty. took it to audi for a diagnostic which cost me £55.
3 faults had registered.
1. coolant temp sensor
2. thermostat problem
3. loss of boost pressure/throttle body issue

audi were very vague in explaining the errors and just printed me off an invoice saying over £800 please to replace the coolant temp sensor, thermostat and throttle body. great......

The car idles fine and runs fine. Although it takes about 10 mins for the temp gauge to move off 50. with the climate control off the temp climbs up to 90. the temp stays between 60-70 when climate control is on.

so.... after reading up on here ive realised that these are quite common things to crop on a4's and see that people have quite easily done the work themselves. so heres what ive done up to now...

1) replaced the coolant temp sensor(good job ive got thin fingers :-) ) cost me a little over a tenner and took me about 30 mins.
2) taken off the throtttle body and cleaned off any residue build up. there wasnt too much but there was some there.

What next. How do i know if there is a problem with the thermostat? could it be linked in with the problem with the coolant temp sensor?
will the cleaning of the throttle body be enough? can they fail?
do i need to clear the fault codes for the car to run normally again(as in not bipassing the coolant temp sensor failure)

i only did the work today so havent had chance to do a proper run. its done about 6 miles and the temp gauge just started moving off 50 as i got back. i left it running a further 5 minutes idling with the climate control off and the gauge moved up to 70.

what should i do next

[Borab0y]

sounds like the temp is taking its time to rise so could need a new stat.

Can you find someone close with VAG COM, then clear the errors, run for a week and have them recheck it.

Did it say 'intermittent' next to any of the errors? sometimes if a fault occurs and the owner fixes it but doesn't clear the error it will still show on the next scan.

[sr-performance]

Hiya mate,
There's an audi specialist just off J30 M1 at Clowne.
www.maintainyouraudi.co.uk

They will gladly give you advice etc and they really are good..

[dalep2006]

cheers for quick replies. is the stat a tricky job to change? i really want to start doing my own bits where possible. labour costs more than parts . anybody near/in sheffield with vag-com ?

cheers , Dale

[dalep2006]

boraboy. Dont know about the vag readout because audi wouldnt give the readout. i wont be going back. it was the most expensive valet ive ever had.