Date: Tue, 07 May 2002 17:25:37 GMT
From: (Lee Marshall)
Subject: My dealer hasn't got a clue, can you help? ('97 9000 Aero, Manual)

I have a major problem with the turbo boost on my '97 9000 Aero. As some of you may know the Aero has a standard boost system (to 0.9 bar?) and an overboost system (to 1.4 bar, according to the dealer). The problem being is that the turbo is exceeding the maximum boost pressure on full acceleration (ie. the turbo gauge is going into the red and beyond), obviously this could ultimately lead in head gasket failure or worse. It appears that it has lost the ability to "dump" the excess boost pressure into the exhaust. My local dealer has had the car for 7 weeks and has currently replaced both the turbo, overboost control circuit and the control unit (ecu) and has checked all the circuitry and pipes. They have also compared my car to another Aero and they are getting identical readings apart for the fact that mine is giving too much overboost. They have admitted to me that they have not the slightest idea what is the matter and they are waiting to hear for SAAB UK to give them a clue. According to the dealer (County Saab, Milton Keynes, UK) they have already spent 2000 in parts and at least the same again in labour. Thankfully the car is under SAAB Approved Warranty. Has anyone had a similar problem with their Aero? Any suggestions? For the month leading up to the problem I had changed from using standard super unleaded to Shell Optimax, could this be related? Hope you can help! Lee

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