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Date: Wed, 9 Aug 2006 22:57:37 -0000
From: "Tim \(remove obvious\)" <the.NOfarmSPAMnospaminternetSPAM.com>
Subject: Re: Okay now I *know* this isn't me...


"DervMan" <thedervmannospaml.com> wrote in message news:44da3bc6$0$26594$da0feed9nospam.zen.co.uk... > "Pete Smith" <pete_newsnospame.org.uk> wrote in message > news:MPG.1f442a771804dc5798992fnospamet.plus.net... > In article <44da1729$0$30329$fa0fcedbnospam.zen.co.uk>, > thedervmannospaml.com says... > > I've only had my 2000 Saab 9-3 2.2 TiD since early June, so I'm still > > getting used to it. This is the first TiD engine used in the 9-3, the 2.2 > > 115 bhp one. I'm using it in conjunction with one of these fuel pump > > modification units (and it makes a huge difference to acceleration). > > > > I've driven and owned all sorts of turbodiesels and in all they've > > performed > > better in cool, foggy conditions and not so good when it's warm. Okay > > until > > the last week the temperature has been pretty much over 28°C and it's been > > especially humid. Now it's cooler and the car feels much, much better... > > > > With this 9-3 the difference between cooler air and warmer is *immense*. > > If > > it were a petrol, it feels like it's under-intercooled and the ECU is > > limiting boost to prevent engine knocking. > > > > Is this a known first generation 9-3 TiD issue? Is the intercooler just > > too > > small? Could there be a loose pipe instead? > > In that last really hot weather (35 degrees), my TDCi was definitely > sluggish. > > The symptoms point (IMO) to a fault in the firmware, because others were > reporting the same problem. > > Basically, as soon as you hit 3k in 3rd or 4th (I wouln't know about 5th > ;-), the power would drop right off until 3.25k, and then take off > again, but quite sluggish. > > Now the weather's cool, it's back to normal. > > > *-*-*-* > > Ding, just about - except I so rarely exceed 3,000 rpm I can't confirm > otherwise... I would suspect that the intercooler is marginal, and if you set up a logger on the charge temp vs boost pressure you will see 60+ deg c charge temp and the ecu pulling boost back. This'll be your problem. Tim..

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