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Old 02-06-2011, 10:15 AM   #1 (permalink)
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Dashpot

Found out that my dashpot on my '94 Yota is bad. It wasn't letting the truck idle down when warm. I tried to lube it with silicon spray as 4X4crawler suggested in a write up, but no dice. I looked for a replacement at advance auto, oreliy and napa with no luck. Is this a dealer only part?
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Old 02-06-2011, 12:07 PM   #2 (permalink)
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You can have mine. 91 22re. I have it disconnected anyway. $20 shipped.
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Old 02-07-2011, 09:57 AM   #3 (permalink)
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Nice kamesama980! Love to see when the board memebers can help each other out! How often do these go bad in 22RE's?
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Old 02-09-2011, 09:17 AM   #4 (permalink)
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Thank you for the offer kamesama980, but now I am not thinking it is the dashpot causing the problem. The issue I am having is that the truck idles fine after start up, but once you start to drive it, it idle high. Its like the throttle is getting stuck open a little. I can push the throttle closed by hand and the idle will drop back to normal. I can also tap the gas peddle real quickly while stopped and it will drop the idle back down 90% of the time. I have changed the idle air control valve, adjusted the throttle plate stop, adjusted the TPS and have backed the adjustment screw for the dashpot all the way out. I have also triple checked the throttle cable and there is plenty of slack and don’t think it is the problem. Anyone have any ideas?
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Old 02-09-2011, 12:21 PM   #5 (permalink)
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Quote:
Originally Posted by KC_YOTA View Post
Thank you for the offer kamesama980, but now I am not thinking it is the dashpot causing the problem. The issue I am having is that the truck idles fine after start up, but once you start to drive it, it idle high. Its like the throttle is getting stuck open a little. I can push the throttle closed by hand and the idle will drop back to normal. I can also tap the gas peddle real quickly while stopped and it will drop the idle back down 90% of the time. I have changed the idle air control valve, adjusted the throttle plate stop, adjusted the TPS and have backed the adjustment screw for the dashpot all the way out. I have also triple checked the throttle cable and there is plenty of slack and don’t think it is the problem. Anyone have any ideas?
Its either idle speed when it gets warm, or on mine, I ended up putting a heavy gauge throttle return spring on, because for some reason no matter what I did the throttle plate started sticking, of course I run no dashpot either.
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Old 02-09-2011, 12:59 PM   #6 (permalink)
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Originally Posted by Mushroom_Toy View Post
Its either idle speed when it gets warm, or on mine, I ended up putting a heavy gauge throttle return spring on, because for some reason no matter what I did the throttle plate started sticking, of course I run no dashpot either.
I was thinking return spring might be the next thing to try. Where did you get the spring from?
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Old 02-09-2011, 01:06 PM   #7 (permalink)
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Also, check that no carbon build-up is blocking the throttle plate from closing all the way~
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Old 02-09-2011, 03:09 PM   #8 (permalink)
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^^^^^^^^^^^^^ after reading through the problem, i would suggest this. Buy a can of brake clean or carb clean, get an old tooth brush, and pull the intake tube. clean all around in there. also pull the idle screw out, and clean the tip of it off, and spray/clean inside that hole.
Almost garenteed to fix the problem.
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Old 02-09-2011, 03:31 PM   #9 (permalink)
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Originally Posted by TNRabbit View Post
Also, check that no carbon build-up is blocking the throttle plate from closing all the way~
Thanks for the tip. When I had the throttle body off to replace the idle air control valve, I cleaned the TB very thoroughly with TB cleaner and a tooth brush. So no carbon to speak of after the cleaning.
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Old 02-09-2011, 03:34 PM   #10 (permalink)
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Originally Posted by Ajones1165 View Post
^^^^^^^^^^^^^ after reading through the problem, i would suggest this. Buy a can of brake clean or carb clean, get an old tooth brush, and pull the intake tube. clean all around in there. also pull the idle screw out, and clean the tip of it off, and spray/clean inside that hole.
Almost garenteed to fix the problem.
Another good tip. I did not know that the idle screw came out and that you could clean the tip and hole. I will give that a try when I get home today and report back.
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Old 02-12-2011, 10:54 PM   #11 (permalink)
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Quote:
Originally Posted by Ajones1165 View Post
^^^^^^^^^^^^^ after reading through the problem, i would suggest this. Buy a can of brake clean or carb clean, get an old tooth brush, and pull the intake tube. clean all around in there. also pull the idle screw out, and clean the tip of it off, and spray/clean inside that hole.
Almost garenteed to fix the problem.
Ok, so i pulled out the screw and cleaned it and the hole. No dice. Still doing it. Maybe the spring is not strong enough as suggested? Any ideas on where to get a replacement/upgrade?
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Old 02-16-2011, 10:31 AM   #12 (permalink)
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Ok, so I think I finally fixed the high idle issue. I lubed the pivot points and around the edge of the butterfly valve in the throttle body. Used a very light coat of 3 in 1 oil. I am not sure why this happened. Maybe the factory lube got washed out when I cleaned it. But I used TB cleaner from CRC, so not sure why that happened. O well, glad I got it resolved. On to the next issue….
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