mpg issues coolant temperature sensor?

[AD1.8T]

Ive had a little search and came across this thread so I dont really need help just opinions.

as of late ive been getting shocking mpg according to the computer I then found the split pcv hose so thought it could of been that but since doing the catch can its dropped even more !

Now my temp gauge does go to 90 and stays there but It takes a good 10 minutes to get to 90 and what seems like forever to drop back to 0 ive been back out to the car 3 hours later and its sitting at 20/30 lol. Im not getting any codes but does it sound like this could be the cause to my mpg issues ?

[mcgee9t2]

If stats sticking open I can't see it hitting 90 while your driving. Certainly when it's this type of weather in summer maybe but not winter

[Nino]

A faulty Temp sensor will cause MPG issues, they are only around £8 fro a replacement, may as well change it, also change the C clip as well cost like an extra 50p.

If that doesn't work Id look on changing the thermostat and for the love of god only use OEM parts.

[WadGTI]

Now my temp gauge does go to 90 and stays there but It takes a good 10 minutes to get to 90 and what seems like forever to drop back to 0 ive been back out to the car 3 hours later and its sitting at 20/30 lol. Im not getting any codes but does it sound like this could be the cause to my mpg issues ?

Sounds like its working correctly to me. If you have found one split hose, there is possibly another your not seeing?

Soapy water spray bottle over the pipes showed me 3 vac leaks i never knew I had.

[AD1.8T]

All the everything has been changed now mate on crap hose left is the aum charge pipe

[Wazzzer]

They are two circuit though, it's possible the ECU circuit has gone down but not the cluster circuit. Although it should flag a fault code up...

[AD1.8T]

Na no fault codes or anything really, just piss poor mpg !