Throttle position switch (TPS) repair, Contact surfaces are worn |
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Throttle position switch (TPS) repair, Contact surfaces are worn |
Cevan |
May 11 2009, 11:47 AM
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#1
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
I've completed my 1.8 to 2.0 motor swap and have my car running really good, except the TPS is worn right around the partially open throttle position.
I've cleaned the surface and the contacts with 2000 grit sandpaper and then used Deoxit electrial contact cleaner. This helped as it only hesitates/bucks at the barely open throttle position and cleared up the issue at positions further along the path of travel. I imagine that it's worn right at the spot where you're most often running at. I searched but couldn't find any threads on repairing this. What I want to do is move the circuit board to the right or left, so that the contacts run on a fresh part of the board. Any ideas on how to separate the circuit board from the metal body and how best to reattach it? It looks like it may be soldered at the bottom right corner. |
Cevan |
Jun 23 2009, 04:30 PM
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#2
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Senior Member Group: Members Posts: 1,079 Joined: 11-December 06 From: Western Massachusetts Member No.: 7,351 |
Even though I fixed mine (at least temporarily), I'll be getting one of these once they've been tested.
Question: Is the conductive material on the board as durable as the original? |
davesprinkle |
Jun 23 2009, 06:45 PM
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#3
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Senior Member Group: Members Posts: 720 Joined: 13-October 04 From: Berkeley, CA Member No.: 2,943 Region Association: None |
Question: Is the conductive material on the board as durable as the original? Cevan, if you look closely at the pics, you can see marks on the board from the wiper contacts. So it's valid to question the durability of the board. A few points of explanation: 1. For some reason, the marks appear more prominent in the pic than they do in person. I guess something to do with the reflective trace material? 2. Having said that, there is definitely a burnished region where the contacts run, just as with the factory design. We've got a spring-steel contact rubbing across a tin-plated copper trace. Witness mark are inevitable. It's definitely not "serious wear" though. (At least not yet -- it will be serious someday, but it will take a while.) 3. I called out a copper thickness roughly twice what the factory used. I also called out a tin plate, which is why these tracks are silver-colored, as opposed to the factory's raw copper. I would expect these new tracks to last at least as long as the factory design, and probably much longer. Sorry, won't last forever, though. |
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