P0171 in 3 miles
#71
Here's a couple videos to check out. Your past problems may have led to degradation of the cat, and I concur with JC, if you have to replace it, be sure to get an OEM one from a dealer. 1. (Less technical)
2. (Highly technical, but pay attention)
#79
The LTFT needs to be resolved 1st. As you know that would ideally be 0%. Looks like you still have vacuum leak you need to fix, then check the O2 sensor. The sensor reading wont look good until the vac. leak is resolved. Check for cracks in the tube between the EGR and manifold. Might take a smoke test.
#80
O2 1 looks normal as it should be O2 2 is reading high 6-7 volts, goes down reving it up,. Is that normal.. Im getting the hang of this... I fix computers for a living . So its a new learning curve.. Grew up in a car dealership in the 60's