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 |
May 12 2009, 05:39 AM
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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 |
Thanks McMark. I did as you suggested and gently pulled the contact arm out a little and got it to run on a new path just outside of the existing path. Put it all back together and reinstalled it, calibrated it and drove it. No more hesitation/bucking. Problem solved. (IMG:style_emoticons/default/smilie_pokal.gif)
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Derek Seymour |
Jun 15 2009, 02:20 PM
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#3
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Member Group: Members Posts: 394 Joined: 10-March 09 From: Yucaipa Member No.: 10,151 Region Association: Southern California |
I think this may have already been mentioned, but Otto is out of the new TPS's.
He instructed me to use a pencil eraser on the switch, which works really really well. The contact strips on mine are bright and shiny now and my bucking is gone. However judging from the grooves I would venture to guess that I will need a new one eventually. I was looking into using Eagle CAD to make a schematic and then exploring options for having them manufactured. Is anyone else doing this? I don't want to jump in on a project that is already being done, nor do I want to compete with anyone. Is there any interest from the community in having these made? |
rjames |
Jun 15 2009, 02:23 PM
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#4
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I'm made of metal Group: Members Posts: 3,937 Joined: 24-July 05 From: Shoreline, WA Member No.: 4,467 Region Association: Pacific Northwest |
I think this may have already been mentioned, but Otto is out of the new TPS's. He instructed me to use a pencil eraser on the switch, which works really really well. The contact strips on mine are bright and shiny now and my bucking is gone. However judging from the grooves I would venture to guess that I will need a new one eventually. I was looking into using Eagle CAD to make a schematic and then exploring options for having them manufactured. Is anyone else doing this? I don't want to jump in on a project that is already being done, nor do I want to compete with anyone. Is there any interest from the community in having these made? There's always interest for repro parts. This part is a popular candidate. Of course it will always come down to how much they will co$t. (IMG:style_emoticons/default/smile.gif) |
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