Saab 9000 Build - Boot Cut Issue - Help Please
Posted: Mon Jul 25, 2016 2:28 am
Not sure if I am posting this in the right place...I have a 1997 Saab 9000 Aero. This car has been extensively rebuilt and modified over the last several years, and last year received a Maptun stage 3 chip upgrade. I have had a the car for four years now and have always had boost cut issues - even before I had it chip tuned. This summer we decided to put the T7 boost control valve in it and have the ECU modified to allow for the T7 BCV's use. The T5 boost control valve is notoriously unreiable. Still am having boost cut issues and am getting very frustrated. My tuner already sent back one ECU and still having the issue (throwing a lot of money at it).
We put a manual boost guage on it, and it is clear that the car is not boosting past 1.5 bars, so not sure why this is happening. Even more wierd is that the boost spikes to 1.5 bars then goes back down to 1.0 bar pretty much right away. I know that the boost spike was pretty standard from factory, but my Saab tuner says that this is a bigger decrease than usual. My family have owned a variety of 9000s through the years (including an Aero), and I feel that the highway acceleration is not what it would have been even with factory standard tuning.
Any ideas as to what the issue could be? I even put in a new factory blow off valve last year with no effect.
One thing I was thinking is installing an electronic boost control system. Has anyone ever done one of these conversions?
Many thanks in advance!
Ed
We put a manual boost guage on it, and it is clear that the car is not boosting past 1.5 bars, so not sure why this is happening. Even more wierd is that the boost spikes to 1.5 bars then goes back down to 1.0 bar pretty much right away. I know that the boost spike was pretty standard from factory, but my Saab tuner says that this is a bigger decrease than usual. My family have owned a variety of 9000s through the years (including an Aero), and I feel that the highway acceleration is not what it would have been even with factory standard tuning.
Any ideas as to what the issue could be? I even put in a new factory blow off valve last year with no effect.
One thing I was thinking is installing an electronic boost control system. Has anyone ever done one of these conversions?
Many thanks in advance!
Ed