i have a 91 z28. it sat for about 3 yrs. I pulled to 305 out and installed a 350. i used the tpi from the 305 on the 350. i have been theough he** and back with this car. I have a code 22, 33 and 43. the car will start but it dies immedatly most of the time. if i bearly hold the throttle down it will idle for a little longer but it always dies. I have not changed the TPS sensor or MAP sensor. I want to know before i spend the money on the 2 sensors, if they would be the cause of the car dying? or could i have a bad ecu? Also could the smaller injectors and ecu for a 305 cause this problem? All i changed was the 305 to 350 block pretty much. the top of the motor and everything else was originally in the car with the 305.