You talkin O2 sensors? If they are wrong it wont stop it from running - just wont run right & I can swap them out anytime, not so worried about that right now seeing as where it was when I started with it, a hacked in 93 computer & engine harness into the butchered 4cy 98 harnes taped together under the hood lol. I just need to get a harness that will mesh with the 98 computer I bought which matches all the new injection components I bought IE: Intake, throttle body w/sensors, injectors & fuel lines etc. I have temp & oil sensors for 98 also. Not much else on these?