Replace the needle and seat in the carby , it's worn and flooding the engine at low speed.
SOURCE: 1985 toyota pickup.22r,automatic trans,2 barrel
There ar two thermo vacuum switches on the intake manifold,one in the center top by the EGR pipe right next to the valve cover,and one center bottom on the outside right below the carburator,it may be that one of them is not fully opening/closing when the motor is cold.I'm not sure on this as I've never had this problem with my 22R's,hopefully this will point you in the right direction,if you want comment back and I'll research this further(it's 5 in the morn and I cant access my 22r manual)
SOURCE: 22R Carb at high altitude
Yes, Colorado is much higher in altitude. Do to higher altitude the barometric pressure is less than sea level by a long shot. Lower barometric pressure mean that less air is entering your engine. Which in turns mean that your engine is now running richer than it was at a a lower altitude. So I recommend checking you engine timing, and adjusting your carbs air/fuel mixture. yes this means that you may need to rejet. but first there is a screw on your 22r's carb that you must adjust to lean the air mixture just right. I have had a stock 22r carbortor before and never had to rejet it. i probibly should have but it ran fine at sea level and all the way to about 10000 ft. after 10000 feet i had to lean the fuel mixture to even alow the engine to run. This screw that you must turn is hidden due to toyota not wanting you to tamper with it and burn your engine to the ground by running your engine to lean. it has a metal plug on the passenger side of the carb about the size of a pencil eraser. you must drill that out and then you can adjust the air fuel mixture. Clock wise is to lean the air fuel. and Counter clock wise is to richen the air fuel mixture.A good rule of thumb is to turn the air/fuel screw all the way clock wise and then back out about 2 and 1/2 turns. That is the factory adjustment. you may only need 2 turns out. Best of luck i hope you get it running perfect. Try this adjustment first then if it still runs rich then think about rejetting.
Here is a picture of what i am talking about.
#1 is the air/fuel mixture, #2 and #3 are cold and warm idle screws.
#4 is a A/c idle adjustment.
SOURCE: 1986 toyota pickup starts wont stay running
It seems there is some kind of air entering the carburator where its not required to do so or the idling soleniod switch is malfunctioning, thus not allowing the air to enter for the engine to idle .
Also recheck the vaccum pipes if they are correctly refitted per the schematics under the hood.More over remove the idling switch and blow some air to the hole probabley theres some kind of obstruction over there .
Good Luck.
Knight.
SOURCE: 22r carb dumping fuel at 2500 rpm will not pass
have you checked you fuel pressure regulator as some times as you rev the engine the fuel pressure will over fill the bowl or even simpler your fuel bowl shut valve may need re setting
SOURCE: i have a 1985 toyota pickup 22r engine the truck
Check the catalytic convertor,they will plug up and decrease your power due to the fact that the exhaust can't get out as fast as you are trying to put it in.Let me know how you make out.
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