fuel is getting alot worse!

**Peter Jones** · 24-11-2009, 09:41 PM

Oh, with VAGCOM in your scenario, it'll tell you all the water temps wherever there's a sensor so diagnosing the thermostat is pretty easy.

Can't do that with a hand scanner.

Pete

**Mitchy G** · 25-11-2009, 12:33 AM

cheers pete thanks heaps for the info

**RedMk2Gti** · 25-11-2009, 06:51 AM

Originally Posted by Peter Jones

Just buy a cheapy VW OBD 2 scanner and look up the codes online.

They're good enough to just tell you what's wrong.

Like this one for $35 http://cgi.ebay.com.au/U280-OBD-2-SC...item3594d08f71

Saves forking out all the time when all you want is a five minute scan.

Pete

Or get a Vchecker, cost abit more but still much cheaper than vagcom.

**balkanac** · 25-11-2009, 10:35 AM

i had the same problem with my R. The temp would vary and it took ages to get up to 90c. Consumption went through the roof. It was the coolant temp sensor. The car runs so much better now. Have a look at your sensor and if its not green replace it. Gray ones dont last very long. Go to IMPARTS, i was quoted $65 for a new sensor. I'd replace that first and then see if the problem is still there. I think its that coz of crazy fuel consumption. I dont think a thermostat stuck open would cause your car to use more fuel.
http://www.imparts.com.au/

**Gravey** · 25-11-2009, 11:56 AM

Originally Posted by Peter Jones

Just buy a cheapy VW OBD 2 scanner and look up the codes online.

They're good enough to just tell you what's wrong.

Like this one for $35 http://cgi.ebay.com.au/U280-OBD-2-SC...item3594d08f71

Saves forking out all the time when all you want is a five minute scan.

Pete

I have been wondering about this Pete as I have a OBD2 Scanner but hadnt tested it yet....good to know! Now I just need to find some free software for Windows 7...might be firing up the Windows 2000 laptop I think

**Mitchy G** · 07-12-2009, 08:26 PM

ok guys, good news, i got my car scanned today at rex gorell VW in geelong, was told this would cost me 50 bucks but it ended up being for free!

pretty stoked about that!

anyway, ima need to replace the O2 sensor, i think i might get the coolant temp sensor replaced as well as the temp gauge still fluctuates a bit, or would this just be because of the O2 sensor?

anyway the main question is how much am i lookin at for an O2 sensor?

**dubbed** · 08-12-2009, 11:02 AM

Didn't you ask how much seeing as you were there?? :S

Maybe buy from ECS Tuning? http://www.ecstuning.com/Volkswagen-...Oxygen_Sensor/

**Shteifen** · 08-12-2009, 11:45 AM

Originally Posted by Mitchy G

oh and btw i rang rex gorell VW and asked about a scan and what could be wrong with it, 50 dollars just to get a scan,

sersously, they would charge you to scan it?
thats absolute crap. it takes two seconds to plug in and get to the right screen. you should not need to pay for that kind of thing, that should be a courtesy. hell they should make you a coffee while you wait for them to scan it!

-steve

**Manaz** · 08-12-2009, 12:21 PM

Originally Posted by balkanac

I dont think a thermostat stuck open would cause your car to use more fuel.

My understanding of a stuck-open thermostat is that it stops the engine from warming up so quickly (it's generally closed to start with to reduce cooling and let the engine get up to temperature quickly). Once the car's running and up to temperature, I'm not sure that too much water flow through the cooling system is possible!