this just happened the other day. when i let off the gas pedal the wideband will read lean right away. but now when i left off, it will gradually go to lean and when im on the pedal again, its like the wideband hesitates for a second while it is lean and starts to climb back to where its suppose to be wherever the a/f suppose to be while im at the pedal. its kind of hard to explain. oh yeah im running the plx m-300

 

ttt