Testing for vacum leaks? and blue temp sender?

[billinjah 0]

Any one got a sure fire way to test for leaks? i will have my g60 running perfectly this week i!!! ive read a few posts about the blue temp sender could this affect cold starting? are they expensive?

[Henny 0]

blue temp sensor and O ring will set you back about £9 from GSF or euro (or about £18 from VAG! :roll: )

 

It's a 1 minute job to swap it over... 8)

[billinjah 0]

i take it that its the one with the blue connector on top? sounds stupid but hey dont want to get it wrong! :roll:

[Henny 0]

yup! That's right... 8)

 

You could try swapping the connectors for the blue and the black sensors over and see if that makes any different. The black one does the temp gauge, the blue one does the ECU, but they're pretty much identical, so if you swap 'em over and find that the car runs better but the temp gauge doesn't work properly, then you've found your problem... ;) 8)

 

p.s. the only stupid question is the one you don't ask but don't know the answer to... ;) 8)

[billinjah 0]

the only stupid question is the one you don't ask but don't know the answer to...

 

now you must have got that from a fortune cookie!! :D

[billinjah 0]

cheers henny that seems to have sorted it!

[Henny 0]

you need a new blue temp sensor then... 8)

[fendervg 33]

Thread resurrection as I'm doing this at the moment - I have an old blue temp sender here - it tests 2860 ohms across the two pins when cold. VAG have a temp vs resistance diagram here - so I presume it's within tolerances at room temperature. Threw it into a bowl with boiling water and it changes to 560 ohms, so that looks right.

 

You can test vacuum by using a T piece in between one of the vac hoses and a pressure tester. I was measuring 1,.5 bar at idle I think.

[Yandards 0]

Thread resurrection as I'm doing this at the moment - I have an old blue temp sender here - it tests 2860 ohms across the two pins when cold. VAG have a temp vs resistance diagram here - so I presume it's within tolerances at room temperature. Threw it into a bowl with boiling water and it changes to 560 ohms, so that looks right.

 

You can test vacuum by using a T piece in between one of the vac hoses and a pressure tester. I was measuring 1,.5 bar at idle I think.

 

Or if its an early MFA (ie non VR) you can go into diagnostic MFA mode and get the MFA vac reading displayed.

[fendervg 33]

@yandards - how does that work? Is that on G60s and 8v cars? I would have thought the 16v doesn't have a MAF as it's purely mechanical fuel injection (K-Jetronic).