just wondering if the computer from my 89 tracker will work in my 91

I believe 89 and 90 are the same and 91 to 93 are the same but no crossover

just wondering if the computer from my 89 tracker will work in my 91

No it will not. 89 and 90 use vacuum timing advance, and 91+ use electronic advance, which is in the ECM.

didnt figure they were the same but worth a try

didnt figure they were the same but worth a try

What's the issue with your 91's ECM?
Are you not getting fuel ? 

having a wiring problem got it narrowed down to the front was blowing fuses cliped a blue wire from the relay goes somehwere up into the computer we think. it stopped blowing fuses but wont start when the wires clipped, when its hooked up  blows fuses again i dont no much about wiring so i had  a guy come out and today to help when he left he got me to rip the dash apart see if i could find a short in this blue wire but couldnt see anything but theres also quite a few wires up there he wanted me to see if the computers were the same just to try if they were