Date: Sat, 15 Jul 2006 16:42:25 +0100
From: "Moray Cuthill" <>
Subject: Re: Could this be the mass air sensor?

"DervMan" <> wrote in message news:44b8c59c$0$5229$ > 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? Also check for any split vacuum hoses, on the engine management piping side. It's quite common for the rubber bits that link up all the plastic pipes/solenoids/actuatos to split, and the plastic pipe to chaf through if not secured properly. Any leaks in the vacuum system usually result in the turbo wastegate not shutting properly (it's vacuum operated via a solenoid valve), and a corresponding lack in power.

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