I did a valve adjustment the other day and i've noticed that my AFR is about .5 leaner in pretty much all conditions (idle, cruise, WOT) than before the adjustment.
The thing is that i loosened all of the valves, they were all too tight. The jerk-*** that did the last valve adjustment must have adjusted them wrong because they were even tighter than the .006" IN and .008" EX that the cams recommend and i am now currently running.
Is this normal? Or is my PLX M300 starting to crap out on me?
By the way its a 95 coupe w/b16 built head, stage 2 cams, 11.5:1 CR.

 

get another wideband and compare...or get a new sensor and compare...problem with the plx wideband is they dont calibrate to free air the rely on the resistor in the o2 sensor to calibrate to...while when the sensor is new this method works fine...but after some use the sensor it will become inaccurate since the plx is still calibrated to the resistor not actual sensor readings....this is why i bought a innovate lm-1 it calibrates to free air not the resistor...this is how it keeps the guarenteed +-0.1 accuracy only wideband that does it....

 

oh really. I actually have another PLX sensor that i can try.