New vTPS aka drosselventil for my 1.6L
I spent some time contacting local salvage yards trying to scavenge a BMW throttle position sensor vTPS (ref:) without any luck.
I ended up buying one online. It is a BMW replacement part. (#13 63 1 402 143). As it turned out it needed some fabrication and modification to fit.. first things first: -The intake valve half moon rod fits in the sensor, but since there's no hole for the rod through the sensor (the hole for the rod is just a socket, it wont feed all the way through), it now sits at a distance from the throttle body, where its hard to fasten it. -The stock TPS harness fits the new sensor connector, but the wires to the pins needed to be changed. -The vTPS operates on 5 volts (as it should with megasquirt) I checked with a ohm-meter what pin in the vTPS outputed the TPS signal. Measuring resistance between the different pins while adjusting the variable resistor, revealed that pin 2 relays the tps signal. The miata '91 wiring diagram shows that pin 2 in the harness is ground. I cut up the wiring going into the harness and switched LT GRN-WHT and BLK-LT GRN. RED still provides power I resoldered my jumpers in the MS DIYPNP, per the wiring diagram and the online instructions. VREF to 1N, TPS SIG to 4N. Here is how the new TPS sits with a new plate with threaded (4mm) holes for the new sensor. |
What's the benefit over the stock sensor?
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This one is actually a throttle position sensor. Aftermarket ecu thing.
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no offense but that looks like a piss poor solder connection and i would not trust it.
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Originally Posted by mmmjesse
(Post 1314125)
no offense but that looks like a piss poor solder connection and i would not trust it.
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Originally Posted by deezums
(Post 1314040)
This one is actually a throttle position sensor. Aftermarket ecu thing.
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Yep
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