1.6 TPS mod
#1
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I've found the bmw throttle position sensor but it didn't have a connector with it. I'll be trying to find a connector for it today at a local salvage yard but in the case that I don't I was wondering if it was possible to connect a 93 auto tps sensor to a 93 5 speed throttle body. I'm assuming it's not a direct swap and that I'd have to drill into the 5 speed throttle body or replace the whole thing with an automatic throttle body. Just wondering though.
#3
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I started to mess with a variable tps transplant. I have a tps from a 95 KL V6 626 which would bolt up using a large O-ring as a spacer since the bolt holes line up, but the damn thing rotates the wrong way. That said, the last gen protege appears to have the same TPS but it rotates the other way - so that might be a cheap alternative. The only thing that would need to be resolved is the "keying" of the tps to the TB shaft.
#4
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A little off topic but I was at the junk yard the other day and found a 323 with an automatic. The throttle body looked a lot like the automatic miata one except it had a smaller throttle plate. Has anyone tried removing the throttle shaft from the 323 and putting it in a miata throttle body? Then just reuse the miata throttle plate and bolt on the TPS. Would this work?
#5
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I've also got the BMW TPS without the connector on it. Being a bit creative with crimped connectors, I was able to attach electric wires which I plan on connecting to the stock harness (using flat crimped connectors).
I doesn't look perfect, but the connections feel sturdy... It's also possible to solder wires as an alternative
I doesn't look perfect, but the connections feel sturdy... It's also possible to solder wires as an alternative
#7
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Pin 1-black wire-5volt in
Pin 2-shielded wire-ground
Pin 3-yellow wire-signal out
Pin 4-ground
Pin 5-WOT switch
Pin 6-Closed switch
See diagram below for pin locations relative to center "T"
Ben, feel free to add [code] tags around the diagram in your post in the MS FAQ sticky to clarify the diagram
Pin 2-shielded wire-ground
Pin 3-yellow wire-signal out
Pin 4-ground
Pin 5-WOT switch
Pin 6-Closed switch
See diagram below for pin locations relative to center "T"
Code:
6 1 5 T 2 4 3
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#8
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OK, that makes perfect sense. the post I was looking at from Ben was a little different. Also I've actually been searching all over the forum for this as well, I know that the stock sensor on my car has a red wire, a green wire, and a black-light green wire. I've only seen write-ups on here for other tps sensors that have those colors for wires. Which pin goes to which wire exactly?
#16
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Got the megasquirt/tps sensor installed. The bmw tps sensor was truly a direct swap. I juryrigged some sockets for pins 1-3 and took off the old sensor and put the new one on and screwed the little bolts back in. Red wire to pin #1, black-lime wire to pin #2, and Lime-white wire to pin #3. Megasquirt still needs adjusting though, but tps works perfectly.