I have a 1990 SR5 3.0 v6 have not been able to get it to run for a very long time. Nothing seemed to be wrong with it, other than it had no spark. Believe it or not the air flow meter was shorting out and for some reason it was killing my spark. I have no idea why or how but it did it but it took me too long to figure it out and to much money in unneeded parts. For future use if you dont have spark and no reason for it check your AFM and see if it reads in spec, if not maybe that will be your reason.