I picked up a one-owner '02 for my daughter in June 2020 with 199,000 on the clock. Always dealer serviced.
When I test drove it, the truck could barely reach highway speeds and bucked at different throttle positions. The deal was way too good to pass up, so I took a chance that it was something easy and not the tranny.
This is what I found when I pulled the plugs:
I installed new NGK plugs and three new plug wires from Toyota. Ran perfect.....
Andreas