Is it normal to want to buy every dilapidated Starquest you see for sale even though you have no time, space or money? I hate this feeling.

So being a b level tech, some diagnostic stuff is beyond me. Sister's 2001 elantra needs to pass inspection. So it threw a code for o2 slow response. Flex pipe was leaking and welded in a new one. No check engine anymore.   So I cant get the o2 monitor or the ccm and fuel monitors to set. (Fuel just set this morning). Co workers want me to peg o2 sensors and an ecu at it without diagnosing it. Waste of money to just guess I say. Any ideas where to go from here?

some of you may know I have been having a problem with n my birth cirt , seems I was never adopted when I was a baby and mny spet fathers name I have used for 70 years is not my legal name , well I have been fighting this for a year and 5 months,, I can't renew my drivers license with out a proper name and birth date on my record   well this week I finally have my day in court for the judge to make my legal name Brown turned in a name change partition to the court   well that part he got

well I still have a crank case pressure problem.   it is blowing like a old school locomotive steam engine.   Can a cracked head cause this problem?   PCV is working properly. car runs great.   I need to do a compression test.   i unhooked the crank case vent hose. i started the car. i plugged the crank case vent hose with my finger for a few seconds. when i released the pressure it exhaled like old faithful.   concerned and don't know what else to test.