 TPS, How to bench test |
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| Pat Garvey |
 Aug 8 2011, 06:56 PM
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#1
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Do I or don't I...........?  Group: Members Posts: 5,899 Joined: 24-March 06 From: SE PA, near Philly Member No.: 5,765 Region Association: North East States  |
Have a couple of early ones that I've cleaned up & polished.
How do you benchtest for usability? Pat |
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| Pat Garvey |
Aug 8 2011, 07:05 PM
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#2
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Do I or don't I...........? Group: Members Posts: 5,899 Joined: 24-March 06 From: SE PA, near Philly Member No.: 5,765 Region Association: North East States |
Sorry for posting in the wrong forum - wasn't paying attention!
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| 76-914 |
Aug 8 2011, 07:30 PM
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#3
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Repeat Offender & Resident Subaru Antagonist Group: Members Posts: 13,504 Joined: 23-January 09 From: Temecula, CA Member No.: 9,964 Region Association: Southern California 
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http://www.pelicanparts.com/techarticles/9...ttle_switch.htm
Dave will probably weigh in on this but follow this link, ohm it out and do a visual for track wear. |
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| Dave_Darling |
Aug 8 2011, 10:32 PM
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#4
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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I believe the contacts are either shorted to each other or open circuit. No real resistance to it. The "accelerator pump" contacts should only get closed (and opened again, and closed again) when the throttle is being opened, not when it is closing.
--DD |
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| Pat Garvey |
Aug 9 2011, 07:01 PM
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#5
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Do I or don't I...........? Group: Members Posts: 5,899 Joined: 24-March 06 From: SE PA, near Philly Member No.: 5,765 Region Association: North East States |
QUOTE(Dave_Darling @ Aug 8 2011, 10:32 PM)  I believe the contacts are either shorted to each other or open circuit. No real resistance to it. The "accelerator pump" contacts should only get closed (and opened again, and closed again) when the throttle is being opened, not when it is closing. --DD Dave, I get your point. The TPS in question is a low mileage 72 (not mine, but my TPS now). I dismantelled it & cleaned it superficially. The put the contact points & tracks under scrutiny with a magnifier. Noted that there was a shallow groove in the tracks & that the contacts were a little oxidized. Took a jewelers rouge clothe to all, with very little pressure. All pieces cleaned up great. There is still a miniscule groove, but it's very shallow. Used a toothpick to raise the contact bars slightly, so I could clean the points. Unfinished, as acquired is pic 1. After refurbishing is pic 2. Think this will be a keeper for "road parts" Pat Attached image(s)  
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