DIFFERENT ECU's?
 

I have 2 ecus from two different 95 SE 5 speeds. They both work in my car, but they both have different orange lettering on them (one says XB and the other says something else). Is there an ecu that has certain letters on it that is best for Re-programing? Let be know what the best ecu is. P.S. I sent one of them to TS to get it chipped and it ended not working with my car. The CEL was on the idle was at 1.5K rpm and it kept moving up and down. I sent it back twice, until I decided to get a refund. Pretty weird stuff.

IIRC early 95's have similar Emissions as 94 models while late 95's have an updated ECU.

that doesnt really have anything to do with it, he has to 95's. and hes saying that they have different serials or some **** on them, not whats different from 95 and 94 ecus