I have a '91 740 Turbo wagon. On Friday it was acting funny wouldn't go into boost on the turbo gague. Kinda limped a little bit but it went away. When i got home i check the error codes i got 2-3-2 1-2-1 and 3-2-2. I know the two about the AMM so i got a new one. Today i tryed the car with the old one before i put the new one in. It worked somewhat ok. When starting up it kinda wannted to buck. But it went away. Only thing is it idle's really rough. My question is would this happen to be with a fuel injector? The problems strarted after i stopped using premium and put regular in. Also would the transmission mounts happend to play into a rough idle? I think mine may be bad. My shifter moves a lot when stopping and on hard braking the car makes a tumping noise, and it's not the abs.