A few years ago, I bought a 1995 900SE from a TSL member in New England. This car was "stage 4;" it had a Viggen TD04, Viggen IC, 3" exhaust, and SQR Stage 4 tune. This car never ran right. It would not idle properly(either idling around 600rpm, or the occasional bouncing idle where it goes rapidly from 800 to 2000RPM), boosted incredibly inconsistently(one pull it would only hit 12-13 psi, next time it would hit 23+, with multiple adaptation runs), and constantly overshot the target boost and hit fuel cut. I replaced everything: O2 sensor, two known good used BPCs and a brand new BPC, known good used AIC and new AIC, known good MAP sensor, known good intake air temp sensor, and had no luck. The previous owner (who had actually bought the ECU new from Automotion) had complained of these issues to Automotion, and they told him it was the BPC and there was nothing wrong with the ECU/tune, and would not help him. I also contacted Automotion, and was told the exact same thing.
In frustration, I put in a stock ECU. All the problems went away. Obviously it was slow, but the idle problems were fixed, as well as inconsistent boost. I then installed a JZW Stage 4 ECU, and it ran perfectly. Consistent boost, perfect idle, no problems.
Next, we tried this SQR ECU on my friends 1995 900SE. It had previously had a Nordic Stage 3+ tune, with a T25, ETS IC from GenuineSaab, and 3" exhaust. Under the Nordic ECU, the car ran fine. We swapped on a Viggen TD04 and the SQR, and this car exhibited all the same symptoms my car had; occasional bouncing idle, low idle, boost overshoot, inconsistent boost. Again, this car had run PERFECTLY with a Nordic Stage 3+ ecu in it. Since I was parting out the car I bought from New England due to rust issues, we moved my JZW tune over to his car. Just like it had done on my car, ALL of the idle and boost issues were immediately resolved. After this, I stuck the SQR ECU on a shelf.
Today, I tried this ECU on a 3rd car, also a 1995 900SE that had run perfectly before. I sold the car to a friend of mine, and he asked that I do some upgrades to it before he took delivery. So, I installed the following: TD04, Viggen IC, 3" turboback, GS anti roll bar, GS 6 puck clutch, hydraulic clutch conversion, GS trans and engine mounts, 308mm front and 300mm rear brakes, full poly bushings, and lowering springs, as well as the SQR ECU.
Imagine my surprise when I started her up, and all the problems I'd had on the other two cars followed the ECU to this car. Low/poor idle, occasional bouncing idle, inconsistent boost, and boost overshoot. He'll be ordering a new tune next week, and when it shows up I'll be taking this ECU out to the shooting range. This bucket of shit is not fit to be installed on any car.
In frustration, I put in a stock ECU. All the problems went away. Obviously it was slow, but the idle problems were fixed, as well as inconsistent boost. I then installed a JZW Stage 4 ECU, and it ran perfectly. Consistent boost, perfect idle, no problems.
Next, we tried this SQR ECU on my friends 1995 900SE. It had previously had a Nordic Stage 3+ tune, with a T25, ETS IC from GenuineSaab, and 3" exhaust. Under the Nordic ECU, the car ran fine. We swapped on a Viggen TD04 and the SQR, and this car exhibited all the same symptoms my car had; occasional bouncing idle, low idle, boost overshoot, inconsistent boost. Again, this car had run PERFECTLY with a Nordic Stage 3+ ecu in it. Since I was parting out the car I bought from New England due to rust issues, we moved my JZW tune over to his car. Just like it had done on my car, ALL of the idle and boost issues were immediately resolved. After this, I stuck the SQR ECU on a shelf.
Today, I tried this ECU on a 3rd car, also a 1995 900SE that had run perfectly before. I sold the car to a friend of mine, and he asked that I do some upgrades to it before he took delivery. So, I installed the following: TD04, Viggen IC, 3" turboback, GS anti roll bar, GS 6 puck clutch, hydraulic clutch conversion, GS trans and engine mounts, 308mm front and 300mm rear brakes, full poly bushings, and lowering springs, as well as the SQR ECU.
Imagine my surprise when I started her up, and all the problems I'd had on the other two cars followed the ECU to this car. Low/poor idle, occasional bouncing idle, inconsistent boost, and boost overshoot. He'll be ordering a new tune next week, and when it shows up I'll be taking this ECU out to the shooting range. This bucket of shit is not fit to be installed on any car.