When I check the obd codes i get the code p0174 which is the 02 sensor saying that bank 2 is running lean the last time it did this was like a month or two ago and i figured it was because of the gas cap and cleared the codes and now its back. I have a suspicion it might happen with high rpms but I have to test it tomorrow. I do not have any pro diagnostic tools but a scan gauge i found in a old car i had. I used it to measure the o2 sensors and b2 s2 is fine it stays at 47% when idle but b2 s1 stays at 52 for a few seconds then goes from 0% all the way to 99% and starts to slow down a bit and goes awol again. I am pretty sure that it is the b2 s1 sensor but i just want to make sure.