Re: TOY: I actually FIXED my TPS!!

["Kerry White" <kerry_e_white@xxxxxxxxxxx>]

Tonight I also fixed my TPS! The readings were eratic and it wouldn't set, 
so I took it apart (involved a knife and some plastic breakage). There's 
nothing to really break in there, but the contacts were slightly corroded so 
I scraped them clean. Popped the little plastic plate back in and 'voila! 
Set fine! I would've never known to dissasemble it if it weren't for this 
list and Marc Sahr! Saved me a bunch! Thanks :) !!!

-Kerry White





>From: "Marc Sahr" <msahr@extremezone.com>
>Reply-To: toyota@4x4Wire.com
>To: <toyota@4x4Wire.com>
>Subject: TOY: I actually FIXED my TPS!!
>Date: Thu, 6 Jun 2002 07:21:22 -0700
>
>So I was experiencing the old buck and miss during low-throttle setting
>driving (you know, like idling through a parking lot or rockcrawling) and I
>had a rough idle. Gotta be the TPS, right? Well I looked at the FSM which
>told me how to adjust the thing, plus I studied this article
>http://4crawler.cruiserpages.com/4x4/CheapTricks/TPS/index.shtml so I
>removed the throttle body, cleaned about a pound of gook from the throttle
>plate and the inside of the throttle body, and then I was ready to adjust
>the TPS. Started adjusting, got the baseline resistance set, checked WOT
>setting, looked OK, went back to double-check baseline... about 1.4k 
>ohms...
>huh? It was OK before. Tested WOT... OK. Went away for a sec, came back,
>tested baseline, it was within spec (I had adjusted it to 500 ohms) and it
>was OK. I removed the TPS and looked at how the thing worked. I noticed the
>return spring seemed to be "binding' and then noticed that when moving the
>TPS from closed to wide-open throttle it would not completely return. So...
>when the throttle was closed, the ECU thought it was partially open,
>sometimes (it was intermittent). The spring seemed to be greasy and gunky,
>so I cleaned the TPS spring with a very careful jet of WD-40, dried up all
>the excess, and voila! No more balky return spring action! I put it back on
>the throttle body, adjusted resistance, bench-tested resistance settings vs
>throttle settings, put the throttle body back on the truck... what a
>difference. Idle is smooth, no more low-speed buck - miss - buck... and I
>saved $140 from buying a new one. Now if I could get my idle speed below
>1100 I'd be happy....
>
>Marc Sahr
>85 4Runner DD "It's only got 220,000 miles, why would I want a new one
>already?"
>81 Hilux longbed 4x4 rock buggy in progress
>
>4x4Wire.com Toyota Section http://www.4x4Wire.com/toyota/


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