i bought my '93 manual tran. xj from a friend that his father got into an accident in. crashed the corner where the ecu is. a corner of the ECU is actualy chiped off. it runs but the check engine light is on and i get o2 sensor and coolant temp sensor codes. i changed them both and i still get the same codes. is there a way to check if the ECU is still good? could something else be triggering off those codes? anybody in socal got an ECU i could use to test it?