Lambda Voltage?

[metz]

Whats the correct voltage for the lambda once the car is warm? my G40 has been running a little rich and idle has been poor on cold mornings for the first few mins. wanted to make sure lambda was ok

[hayesey]

it should oscillate between 0v and 1v at idle up to temp.  When driving it'll vary between 0v and 1v depending on the O2 reading it's getting.

[OCDmatt]

Yeah you'd need to scope it ideally to see what it's reading, it'll probably be too quick for a mutlimeter

[metz]

cheers lads.

I need the 2 + 2 connection to stick it on vag com really

[hayesey]

you can get them on ebay for not a lot.  ODB to 2+2 adaptors.

[OCDmatt]

You used one Hayesey? I'm sure I've got a gen one at home but can't find it! Just heard some of the ebay ones being dodgy?

[hayesey]

an ODB to 2+2 adaptor?  Yeah I've used one.  Seems to work ok with my old ODB-rs232 cable.  Can't even remember where I got my ODB-rs232 cable from now but it seems to work better with older stuff than USB cables.  Just means I have to keep an ancient laptop which still has an old fashioned serial port on it for this purpose!

I find vwtool.exe works better with g40 digipants than vagcom.  There's a download link I put in the FAQ section somewhere.