If you see the small hex adjuster inside the tower, you can adjust it. You have to push down with the proper tool (I think it's approx a 3mm hex (allen)) you may have to twist around a bit to get that hex to drop into another adjsuter, the upper hex is spring-loaded slightly. So in other words you don't just put an allen into that adjuster that you can see and turn to adjust, you push down with the tool, may have to twist around a bit, you'll feel it drop down a slight amount, THEN you are actually adjusting. Kind of a trick and a bear to explain. Just make tiny adjustments, like 1/4 turn. Blip the throttle a little and see if it changed. Sorry I don't remember what the duty cycle is on this car, I may have info somewhere. But a fixed position with the engine warmed up is a fault. FIRST thing to look at is the OVP relay fuse, as that puts you in a fixed mode like this. Make sure the O2 sensor is there and connected. Sometimes someone will save money on the exhaust and next thing you know the O2 sensor is in a landfill someplace instead of in your exhaust stream
I would investigate the fixed operating mode before doing much with that adjuster though, you can't really change anything until the engine is in closed loop.
Gilly
Gilly