same code PO171.
Today at school we used the Snap On scan tool, IAT, ECT, both O2 sensors, MAF are all working correctly.
I have replaced several vacuum lines, inspected the line that goes from the top of engine to the air filter box.
The upstream O2 sensor was replaced twice so far, MAF cleaned a few times.
The Snap On tool was showing bank 1 was pretty lean, bank 2 is fine.
When the light came on I was getting on the highway, it was hard to accelerate, had to really hit the pedal to get it going.
Anyone have any idea what to do next, if I could find the hose that has the PCV valve in it, I would inspect it, I cant find out where it is now, I replaced the valve once forgot where it is.
