im not the best with any of this but i just readjusted my valves(trying to get my car running right) and i have stock studs and crane oem replacement lifters and crane SA RR's. i went to zero lash and 1/4 turn after that. is that enough or not? could valve adjustment be the reason why my o2's are reading crazy? i used the get the #1 up and adjust this n that one and make one complete turn etc. should the 1/4 turn be enough or do i need to go 1/2 turn?