"DervMan" <thedervmannospaml.com> wrote in message
news:44b8c59c$0$5229$db0fefd9nospam.zen.co.uk...
> I'm still new to this GM / Saab TiD engine, but yesterday I was feeling
> changes in engine behaviour (output) under acceleration. Some times I
have
> plenty of acceleration, sometimes I have next to no acceleration :) and it
> was varying. This morning it was find...
>
> It feels just like a petrol turbocharged donk when the ECU shuts down the
> boost pressure because it was getting too high...
>
> I'm thinking an intermittent problem with the mass air sensor, a DTi thing
> on UK Vauxhalls and given the TiD's origins, sounds plausable. Is there
> anything else it might be? A collapsed hose somewhere? Crud in the air
> filter?
>
Unplug the AMM and go for a drive. If its now smooth, albeit down on power,
but consistent, then yes the issue is 95% with the AMM.
Tim..