Success!
But the degree of success remains unclear.
First off, I was barely able to break the screw free after cutting a slot all the way down, just a micro meter away from the base, and using the largest flathead screwdriver I had. I put all my strength into it, much more than I thought I had, and it finally broke free. I meant to take pictures of everything, but I was just totally determined to get my truck running again, so I just threw everything back together without taking pics.
I reused the screw since none of you will actually tell me where to get another one, it works fine. And I greased the screws with penetrating oil before they went it.
The first thing I noticed when taking her for the first testdrive was the transmission. Each gear was shifting perfect, better than it was before, even the 2-3 upshift was smooth as butter, and it had always been a little harsh before the TPS failure.
Launching the truck from a standstill was also good and consistent.. The torque was nice and girthy, I couldn't reproduce the flaccid, weak launches. Which is good.
Then I took her up a steep hill, to Mullholland HYW, which is paved, and her power was still not as strong as I liked. But was slightly better than before. I must have drove her around for 30 miles, testing all gears and just listening to the truck.
I noticed that after getting back down the hill to my street, the standstill launches were getting weak again, but the shifting was still good.
I think I know why these sensors fail. It's the heat.
I checked the throttle-body in my garage with the engine still running and it was damn hot. Everything was hot. It's a big engine.
I touched the sensor and it was damn hot too. It didn't burn me, but it was hot enough to immediately understand this temperature not being good for the plastic components of the sensor.
I'm thinking of wiring a nice, high-RPM PC fan and maybe even a heatsink directly to the sensor! I have plenty of spare fans and heatsinks lying around.
What do you guys think?
The temp is clearly too much for the sensor in my opinion.