Long story short, I had issues with bogging down under acceleration. It was an intermittent issue so I assumed fuel pump, but I replaced the pump and nothing changed. So I unplugged the O2 sensor, ran it for a day, and the issue was gone. A new o2 sensor should fix the problem. The old one fought me all the way out and the threads were destroyed on the sensor. I want to run a tap/ thread chaser in to clean up the y-pipe threads, anyone happen to know the thread size on these things. '95 5.2l

 

First hit on Google validated my memory - 18mm x 1.25

Thread chaser designed for this: https://shop.advanceautoparts.com/p/...230/10550591-p

RwP

 

Damn you're quick Ralph! My initial google search didn't turn up anything. Appreciate it, thanks!