yeah#1 i would replace the o2


im not sure what to tell you about the injector. i would doubt a single off a set of 4 would be enough for youre entire engine...i would check around on that one


vss...look at it good. maybe pull off the plug and look at it. on my civic (96) it got corroded and a prong actually broke off...i hotwired it.. i would check for all that. you never know


hope some of that helps