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I finally found my issue. Discovered it removing the throttle body to get to a stripped TPS bolt. I am putting my TPS back on, but it now reads 4.x cold without throttle and doesn’t move under throttle. Is there a specific way to reinstall the TPS like twisting it on 180 degrees or anything I am missing?
There are tabs in the tps housing that engage with the tabs on the tps. When they're engaged, you'll have to put a slight twist on the tps to get the mount points to line up. That's how you know you're installing it correctly
I honestly don’t know if Mazda could had made it harder, make that impossible, to reach the bottom
screw of the tps if they would had had a 2nd grader design it. At this point I’m about to sell my whole FD rather than keep trying to get the TPS back on. I get the values correct and the second I bump it trying to reach the F’in screw it goes all out of whack again. A part this small and easy should not take 4 days and two break downs just to screw back on!
Rant over
There are tabs in the tps housing that engage with the tabs on the tps. When they're engaged, you'll have to put a slight twist on the tps to get the mount points to line up. That's how you know you're installing it correctly
got it in the tabs. Have my PFC where I can see it, and as I twist the TPS to line up the bolts it goes slowy down to .4, then .01, then right as I get the bolt lined up it jumps back to 4.9. Does this EVERYTIME. I must be doing something wrong. Anyone with experience on this? Frustrated beyond belief with what should be a simple thing.
You don't have to replace the factory screws with screws. You install hex head or allen hardware on there to make it easier to access. Keep in mind this whole process can be done with the throttle body removed so you don't have to work between it and the firewall.
In addition to that, while watching the tps values on the commander, you can twist the tps through its range uninstalled and verify it sweeps cleanly and doesn't jump around. If it does jump around in values then you may have a bad tps as it seems you are describing.
You don't have to replace the factory screws with screws. You install hex head or allen hardware on there to make it easier to access. Keep in mind this whole process can be done with the throttle body removed so you don't have to work between it and the firewall.
In addition to that, while watching the tps values on the commander, you can twist the tps through its range uninstalled and verify it sweeps cleanly and doesn't jump around. If it does jump around in values then you may have a bad tps as it seems you are describing.
I did exactly that. Got fed up and pulled the throttle body, replaced with hex as well. I have used two diff TPs, both sweep fine. But as soon as I get it in place, 4.9 on both. If I could install it without twisting it, I would be golden, but as soon as I twist it into place, it goes the 4.9 again. Stumped
Got it. Found an old buried thread. The brass tabs go against the BACK of the plastic u shape slot in the TPS, not INSIDE the u shape slot. Stupid design, goes against logic.
Last edited by Tom Smith; May 19, 2024 at 03:46 PM.
Got it. Found an old buried thread. The brass tabs go against the BACK of the plastic u shape slot in the TPS, not INSIDE the u shape slot. Stupid design, goes against logic.
Makes sense from a structural standpoint. There is constant spring pressure on that surface, so those two walls are there to make sure that front face doesn't fold over after time. This thing is going to see hundreds of thousands if not millions of pressure variation cycles and without them I don't think it would last too long. If they were put in those U-shaped pockets, wouldn't the tabs just move out of the pockets and not rotate the TPS when the butterfly is turned? I haven't had one of these apart for years so I don't know how snug the tabs would fit in that pocket
If you break one of these open, on purpose, or by accident, by dropping the TB on the floor, for instance, you will be shocked to see how flimsy they are inside for such a crucial role.
Always best to pick up a spare when one comes along for cheap.
Often people sell UIM/TB with the TPS attached without realizing the value is in the TPS.
