hi guys,

think im getting hold of the lite version tonight - was looking to start collecting some data to help find out why my vrs is boosting so low.

So apart from the maf logs what else should i look to gather?

Cheers

chris

Hi mate, iirc i usually log 003 020 and 115(actual vs requested boost) together. Cheers

IIRC its 32 to get the lambda additive/multiplicative? values which are good to determine boost leak or vac leak or both.

here it is http://forums.vwvortex.com/showthread.php?1265064-VAG-COM-procedures-for-testing-the-MAF-O2-sensors-and-catalytic-converter

also from rosstech http://wiki.ross-tech.com/wiki/index.php/Fuel_Trim_Info

we just had a go with the lite version - but it only lets you log up to a certain block number - i think 25 grrrrr.

Block 32 you just need to read as it stores the latest value. if you clear any faultcodes this block gets reset and you will need to run the car for a while before it registers again

Ok I only did this at idle because I am not really sure what I am doing and borrowed my mates vcds stuff.

The CEL came on this morning so I went and borrowed the vcds.

Block 32 at idle shows 1.9% in the 1st box and -13.3% in the second box. Was I supposed to rev it or go for a drive as well?

 

The normal scan shows fault 16804 catalyst system bank 1; P0420 - 35-00- effeciency below threshold, Which hasn't changed from the last scan.

 

I think the exhaust is blowing at the join between new "cat" section and rear section as it seems louder than I remember on my old Mk 1's but then that was some years ago and I've had a Mk2 in between.

Sorry posted in the wrong thread! D'oh