Idle issues on my 22R
Ok so a few weeks ago I ran my 87 Toyota pickup real low on gas. It has a 22R. On my way to fill it up it started idling really rough to where it wanted to die. A few days later I cleaned the carb, changed the plugs wires rotor cap fuel filter and air filter. It seemed to help for a little bit. But then it went back to idling rough after I would wind it out to about 4000 rpms. When i park it and start it back up a little bit later its fine. But once i wind it out again it started actin up again.
Then today i was drivin it and now it either idles really rough to where it almost dies, or it idles at 1500 rpm or higher, all the way up to just over 3000 rpm. I have no idea where to even begin looking to try and diagnose the problem. I NEED HELP this is drivin me crazy! |
Carburetor float level?
Needle valve sticking? |
Yes, definitely check the float level first. The fuel level is visible, or should be, in the sight glass.
The fuel level affects all of the carburetor circuits. |
Subbed. Even though I have a weber and really good with carb's I had this issue at my last bog. Broke a timing chain shortly after. I don't think it's related to the timing chain, but who knows. Another thing I have noticed afterwards, is that my choke isn't automatically engaging. Pressing on the choke plates and operating the throttle gets it to engage, but it doesn't engage on it's own.
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Originally Posted by xxxtreme22r
(Post 51970814)
Subbed. Even though I have a weber and really good with carb's I had this issue at my last bog. Broke a timing chain shortly after. I don't think it's related to the timing chain, but who knows. Another thing I have noticed afterwards, is that my choke isn't automatically engaging. Pressing on the choke plates and operating the throttle gets it to engage, but it doesn't engage on it's own.
Cold start, step on the pedal and the choke plate(s) should be pulled over and shut, and a cam should engage the throttle to hold the throttle open a touch. If it's not flipping shut and holding the throttle open on its own, there may be an issue with the pull-off coil not being adjusted correctly, the choke plate shaft may be bent or the bushings or linkage may have simple dirt interference. |
also i forgot to add that when i shut the truck off with the key it says running. it doesnt shut off immediately. it delays then shuts off as of today. which i also have no clue which would cause that. im hoping they are related. because they both started at the same time.
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Originally Posted by adeantoni
(Post 51970880)
also i forgot to add that when i shut the truck off with the key it says running. it doesnt shut off immediately. it delays then shuts off as of today. which i also have no clue which would cause that. im hoping they are related. because they both started at the same time.
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Originally Posted by abecedarian
(Post 51970904)
Possibly the fuel cut solenoid.
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Originally Posted by abecedarian
(Post 51970904)
Possibly the fuel cut solenoid.
Here's some pictures of the Fuel Cut Solenoid. The first on is where it is located on the carb. The second shows a description of what it controls. The second pic doesn't show the shading very well to denote the fuel passage of the idle circuit. The Fuel Cut Solenoid blocks the passage way the the fuel would travel to the idle port. http://farm9.staticflickr.com/8421/7...999c4627_b.jpg http://farm8.staticflickr.com/7121/7...f864bd16_b.jpg |
The ONLY thing that fuel cut solenoid control is fuel going into the carb's idle fuel. It does not control the fuel bowl vent, nor does it control the choke. Toyota is not a feeedback carb system.
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ok ill check it out when i get it back home next weekend. Im off at college, and most of my tools are back home but hopefully soon i can take a look at it... i might just switch over to my weber though.. so i don't have to deal with the toyota carb anymore.. thank you guys for responding. ill be checking out all the ideas as soon as i can and ill report back
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Originally Posted by xxxtreme22r
(Post 51971324)
The ONLY thing that fuel cut solenoid control is fuel going into the carb's idle fuel. It does not control the fuel bowl vent, nor does it control the choke.
Originally Posted by xxxtreme22r
(Post 51971324)
Toyota is not a feeedback carb system.
We (California) have the extra functions of the oxygen sensor, the Electronic Bleed Control Valve (EBCV) & the Electronic Air Control Valve (EACV). The last two will alter the air of the air/fuel mixture of the combustion via the emission computer. The EBCV does it upstream of the combustion chamber, in the carburetor, and the EACV does it after the combustion chamber, in the exhaust manifold. |
I also figured out that the idle issue when the throttle wasnt sticking was caused by the egr valve. it was sticking which caused a vacuum leak. so i disconnected the vacuum lines from the egr and plugged them. now it runs perfect.
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if the tank had some junk in it and it was real low it could have possibly picked up some junk on the bottom of the tank. kind of like a sink drain when it gets about empty it takes the junk down last. possibly have it in the carb somewhere now.
just a thought. |
Originally Posted by kornhuskerwizard
(Post 51986785)
if the tank had some junk in it and it was real low it could have possibly picked up some junk on the bottom of the tank. kind of like a sink drain when it gets about empty it takes the junk down last. possibly have it in the carb somewhere now.
just a thought. |
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