Below is my install of a Wells tps210, There are a few steps in the begining and middle that I missed taking photos of but you should be able to fill in the gaps

This is the sensor that I used



I started by removing the stock tps sensor and removing everything to get it to the bare plate, the two items that I kept were the actual plate and then the yellow plastic piece that fit on the throttle body shaft (dont have a picture of that)

You will see I removed the metal spacer as well, this was done by flipping it upside down and giving it a good hit with a hammer over an open vise

Next I marked on the backer plate and the Wells TPS sensor the direction of motion


You will see in the photo of above I already have the yellow plastic piece insterted into the Wells TPS, what I did was cut it down to just the upper half of the piece, then take a file and file away grooves for the Wells TPS to slide into. These are the files I used


Next I took apart the Wells TPS plug


Then mounted the Wells TPS to the stock miata backing plate. To do this I installed both back on the throttle body and found my alignment, marked it and then removed them both. Clamped the Wells TPS to the plate and drilled two holes and bolted the TPS to the plate




Then soldered the Wells TPS wires to the stock connector



Next was to reinstall the stock cover, because of the mounting position of my sensor I needed to remove the back corner of the case to get it to fit



And then install it in the car

 

Thanks for the write-up. I just got my Wells sensor in the mail and it looks identical to yours, which is significantly different than the one used in the other, more famous, write up. This will be very helpful.

Thanks again.

 

Nice work with on the dshaft and the plastic Denso cover. I would cover the soldered connections with tape or hot glue.

 

Props for a write-up with pix.

In my experience, simply cutting off one of the tabs on the inside of the Wells TPS is much simpler and easier than transferring the "yellow piece." And it lasts. 3 years and 30K on mine with no issues.

 

he covered them with a big plastic cover.

 

glad it could be helpful

 

Does it work properly like that, with the D-shaft off center?
When I installed mine, I had it off center as well and it put noticeable stress on the tps. With the mounting screws a bit loose, I saw it move as I turned the throttle. Didn't feel right so I binned it and bought the correct tps with D-shaft hole. YMMV of course.

 

Yes... which has a hole in it. Sure the chance that water or a foreign object will get inside causing a short is very low, but I like redundant safety measures.

 

You may be right (and maybe I misunderstand what your concern is), but here's how I see it (bear with me as I somewhat state the obvious):

The throttle only rotates 90 degrees. Therefore, it would stand to reason that the TPS would only rotate 90 degrees as well. So it would seem to me that you need to identify the 0 degree (closed) and 90 degree (open) position on both the throttle and the TPS and align them accordingly. Then the yellow plastic piece can be inserted relative to that collective orientation and should lock the two in place.

Wouldn't that eliminate the possibility of undue mechanical stresses being put on the TPS?

 

Westfield, which TPS did you use?

 

Last I checked, my throttle rotated 90°. If yours only rotates 45°, a repair is in order.

 

Yeah, har har. Brain fart.

 

If you can align them properly you're good to go, but I found it hard to do. No matter what I did, it always ended up a bit off center. When I turned the throttle by hand, I could see the tps move out of center. Tightening the 2 bolts solves this of course, but for how long? It's just a cheap plastic pot. I'm probably paranoid, but I didn't want the risk of having a bad tps signal effing up my accel fuel etc.
I'm using the Wabash. I just slid it on the D-shaft, marked the 2 holes and it was perfectly aligned.

 

I couldn't find the Wabash part. I wish I had though as it seems to be the better choice.

 

I will not!

 

Hahaha. I meant that as a noun rather than a verb. LOL.