I have a 89 tracker with a blown 1.6 efi. How hard is it to swap in a 1.6 16v efi? What year did they come in? Will the wiring, ecm, bla bla bla and anything else you can think interchange?

Thanx, Shaun:D

Guarantee that you will have to switch out ecm. Just went thru the ordeal with trying to find the appropriate box for a 91. If you call a Chevy parts department they can tell you the correct #'s and what boxes fit with what year engine. Good luck, Kerry