ok... so all of them 1,2,5,6,7,8 all read 145 but 3 read 135 and 4 reads 150... could there be a gasket leak causing this? why the hell does it pop? I pulled all the plugs... all were fine cept #4 looks a lil lean and #8 looks lil rich... any suggestions? i figured out that 135 is 10% lower than...