Date: Mon, 14 Sep 1998 16:07:49 -0700 From: Justin VanAbrahams <jvanabranopsamnet> Subject: Re: Turbo Boost problems
Paul Aspinall wrote: > > I have an 89 9000 Carlsson. I have had problems with Turbo boost for a few > months now. The car seems to imtermittently reduce itself to basic boost for > no reason (ie. the boost guage moves half-way into the yellow). > Occassionally I do get full boost (all the way into the yellow), but it is > quite rare. > > I have changed plugs, air filter, cleaned injectors, tried new boost > solenoid - but no luck. > > Has anyone had this problem, or can anyone help??? > > Thanks Did you try a new APC box? That would be the next place to look. Either than or a vacuum leak. The APC box is the *sole* controller for boost. It interacts directly with the APC solenoid, so if you're getting basic boost, it's 'cause the APC box said so - given that the solenoid itself is good. Now, things that will normally cause basic boost are a failed apc box, a failed knock sensor (may give the *illusion* of basic boost) or the cruise control system being engaged or malfunctioning (check the pop-off valve near, the clutch & brake pressure switches, and the cruise control 'ecu' itself). My money is on a bad APC box, though. -Justin
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