'lo all,
I am here beseeching your wisdom.
Those of you who saw my car at the Surrey Rolling Road saw that it was a bit broken, turbo apparently only boosting 0.2bars on the run, 230 horsepowers suggesting that 20 horses are having a break. I kind of knew it was a bit broken already from butt-dyno.
So why is the turbo not boosting? This is the question, and it is perplexing - because the turbo does boost sometimes, I see it (very rarely!) reach 1.1bar peak on my boost gauge under certain (not yet identified) conditions, most other times it does hover around 200-ish mbar.
So: I can be reasonably certain there's no boost leak, as there's no lack of boost at all times; so intercooler piping et al is probably OK.
I do have a forge DV - I'm reasonably certain this is functioning nominally, as improper functioning would result in a CEL if I'm not mistaken (anyone with a more informed view please comment). However it is possible that VW have fiddled with it following my accident in 08 and I haven't had an opportunity to properly investigate it.
The other option is that my software (I'm running Superchips at the mo, but lacking a Bluefin handset) is acting screwy. My money's on this one as it's the neatest explanation of why it still boosts correctly sometimes but not other times; but why would the software be operating incorrectly? A few (mostly airbag IIRC) controllers were changed following my accident, could this be a causative issue? Worth trying other software on there just to see what happens?
If anyone's got any other thoughts, please do chime in, as I wanna get this fixed now, it's bugging me a lot. I'm also toying with the idea of just giving the car to someone for a couple of days to just fix as I've been hella busy of late. Any recommendations on that front as well?
Thanks in advance.