Hi guys, im still geting code 12 but im all so geting code 31, i know 31 is airflow, and 12 is RPM #1, whats this and how can i fix it, im sure its the leads or coil, i have new leads on there way to me, and i have 2 coils from a 2nd 1UZ i have sitting, but i will wait till i get the leads...