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Old 10-08-2012, 06:45 PM   #1 (permalink)
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86 22r idles too high

Hello gang, Newbie here. When Starting my 1986 22r pickup I floor the accelerator twice, then remove any pressure. It starts right up but at a normal (600rpm) idle. As you start off down the road the idle goes up to a nice 1800 to 2000. If you stop the engine after it's warm, then restart it 5 min later, it will idle just fine until you go a few feet or so, then it's back to 1800. I pulled the hose off the dashpot that pulls on the carburetor shaft, and the idle went back to a nice 600, SO, the cable isn't sticking, its all caused by the vacuum on that little dashpot. I put the hose back on. Took the air cleaner top off and saw a small vacuum pot and a device with a phillips screw in its top. Looks like a heat sensor Maybe??? Anywhoo, I started screwing clockwise (down) and the revs went even higher. Soooo, I screws back out about 3 complete revolutions and the engine only goes back to 1800. I then tap on this little device with the plastic handle of my screwdriver, and lo and behold, the idle goes back to a nice 600. Maybe its stopped up, because after I started down the road again the revs went back up but maybe only 1200, or so. Can that little sensor be cleaned out or do I need a new one. Maybe its not all the trouble. Could it be something else?? THANKS in advance. Mack
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Old 10-09-2012, 06:27 AM   #2 (permalink)
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I wish I had the answer. I thought the adjustment screw had a coating on it so you wouldn't adjust it. Have you tried removing it and looking at it?
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86 Hilux LE (blue)
Other Toyotas : 79 Corona DLX sedan (Mint green), 89 Corolla DX sedan (wine), 88 Camry V6 LE sedan (blk), 86 Hilux std bed (wine), 82 Celica GT hatchback (bwn), 78 Celica GT coupe (slvr), 76 Corolla SR-5 coupe (wht)
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Old 10-09-2012, 08:46 PM   #3 (permalink)
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THANKS for the comeback Bryan. Started it up today and it idled up to maybe 1000 or so until I got to town (3mi.) then idled down to 600 and gave no further trouble the rest of the day. Will it do that tomorrow??? Still, I need to take out that little sensor and try to clean it. Maybe carb cleaner or wd-40. Compressed air may rupture something. My FSM should be here this week, so I can put names to some of the components. Will post results in a few days. THANKS again. Mack
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Old 10-12-2012, 09:46 PM   #4 (permalink)
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All is well!!!!!!!!!!!

So far, so good. The tapping I did on the heat sensor worked. It seems to idle fast enough when started (about 1500), and settles down to a nice 600 or so when warm. As the saying goes, "if it ain't broke, don't fix it". Get this, The Haynes manual says cold idle should be 2600rpm for 81-87's, and 3000 for 88 on. Hey, why not just run a shaft through a formed hole in the radiator, put a prop on the end and FLY into town??? Too fast, too fast. This truck has been sitting up for awhile, maybe it just needed running?? Mack
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