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Date: Thu, 15 Apr 2004 06:57:12 -0400
From: KeithG <noonenospamay.com>
Subject: Re: APC problem, Saab 9000CS lpt Bucking under boost


In your case, if the DI was changed and it still runs on 3 then 4 cyl upon startup, it may be a head gasket starting to go. My 900 did that before I replaced the head gasket. Does the coolant level drop slowly over time? As for the original post, If the car accelerates very hard, it may be the sticking wastegate. Mine was an lpt, and it just feels like a 3l v6 or so. It does not feel like 'Wow, this thing is fast', it feels like 'This thing is adequate, no more'. To sets the theory, you'll need some 1/4" hose and a hand pump (bike tire pump, soccer ball pump). disconnect the existing hose from the wastegate actuator and hook the new hose there. If you can suck on the hose and it is free, no resistance, the actuator is bad and must be replaced. Now, pressurize it with the pump. If it moves, it is probably fine. If not, remove the actuator arm from the wastegate arm and see if it will move now, under pressure. If so, the wastegate itself is stuck and needs to be freed? My bets are on the actuator. Good luck, KeithG Andy wrote: > Hi, > > I have a 1995 LPT 2.0 CS, and this does exactly the same thing. Except it > does not do it all the time. More recently I have found that it starts on 3 > cylinders only, then after a period of a few seconds to 1 minute, it starts > running normally. I am suspecting the 2 faults are connected, and are due > to some grounding or connection problem. > > I have been told the DI unit is the likely culprit, but it has made no > difference to my Saab when it was changed. > > But if you find a solution, please be sure to let us know. > > Best Regards and Luck. > > Andrew > > "Anthony Cooke" <ant7t5nospamali.co.uk> wrote in message > news:407d1dae$1_1nospamntp-2.news.uk.tiscali.com... > >>Hello, I have just bought a 1996 9000 CS eco. It's my first Saab and I > > think > >>it's great. >> >>It is running fine under normal conditions but when I go to overtake ;) > > the > >>fuel cuts out as soon as the turbo kicks in. Someone has suggested that an >>APC Solenoid or control box has gone bad and is protecting the engine when >>it doesn't need to. The problem starts at around 3500 revs but only if I'm >>heavy footed. >> >>Could anyone tell me a little more about these gadgets and how to test > > them > >>and source them cheaply for replacement. >> >>Thank you in advance, >>Anthony >> >> > > >

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