Intermittent high idle
#21
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I sent Phil a PM about this a while back, but I'll post it here so everyone can see it.
Basically my idle would occasionally get "stuck" very high and a blip of the throttle would drop it down to normal. My poor 4Runner does not have a tach, so I don't know how high it sticks, just way above normal idle. I previously posted that I removed my dashpot but the problem still existed, but come to find out that I did not entirely remove it, I only pulled the vac line off that restricted the air flow into the diaphragm. Turns out that there is a little set screw that is connected to the throttle lever that contacts the dashpot and the little tophat on my dashpot was getting cock-eyed and causing the throttle lever to be stuck. I'm sure there is probably some adjustment that I could do to the setscrew to make the dashpot work fine again, but I just removed the set screw entirely and the high idle issue is GONE. Truck runs fine without the dashpot.
Basically my idle would occasionally get "stuck" very high and a blip of the throttle would drop it down to normal. My poor 4Runner does not have a tach, so I don't know how high it sticks, just way above normal idle. I previously posted that I removed my dashpot but the problem still existed, but come to find out that I did not entirely remove it, I only pulled the vac line off that restricted the air flow into the diaphragm. Turns out that there is a little set screw that is connected to the throttle lever that contacts the dashpot and the little tophat on my dashpot was getting cock-eyed and causing the throttle lever to be stuck. I'm sure there is probably some adjustment that I could do to the setscrew to make the dashpot work fine again, but I just removed the set screw entirely and the high idle issue is GONE. Truck runs fine without the dashpot.
#22
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Hey Corey - I finally got around to addressing this last night on my truck. I disconnected the cable, and ran some graphite in/out of the sleeve several times, then re-attacahed the cable to the throttle butterfly.
I also used some 3 in 1 oil on hte spring for the throttle. I looked at the top of the dashpot and the set screw seemed to be sticking a little - I oiled the top of the dashpot where they contact each other....some of the oil dripped down to the diaphragm of the dashpot so hopefully that's not bad. Also, a couple months back I replaced the filter and hose that attach to the bottom of the dashpot - mine was gone, for a long time....
I also checked the 3 metal tubes that enter into the top of the throttle body - they were clear. I shot some carb cleaner in there as well, just to make doubly sure.
I haven't really taken it for a good drive since but I'll keep an eye on it and report back if it persists.
Thanks again Corey.
I also used some 3 in 1 oil on hte spring for the throttle. I looked at the top of the dashpot and the set screw seemed to be sticking a little - I oiled the top of the dashpot where they contact each other....some of the oil dripped down to the diaphragm of the dashpot so hopefully that's not bad. Also, a couple months back I replaced the filter and hose that attach to the bottom of the dashpot - mine was gone, for a long time....
I also checked the 3 metal tubes that enter into the top of the throttle body - they were clear. I shot some carb cleaner in there as well, just to make doubly sure.
I haven't really taken it for a good drive since but I'll keep an eye on it and report back if it persists.
Thanks again Corey.
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montanatruck
86-95 Trucks & 4Runners
15
02-26-2017 07:07 AM
1998, 22re, 4runner, 87, gas, high, hot, idle, intermentant, intermitten, intermittent, rough, stays, sticking, toyota