Carburetor choke adjustment

[VinceG2]

Regarding carb spray: You spray that down the 2 nozzles on the top of the carb. Spray it while the car is warm but not hot and you made have to push the cam to keep the car from dying as you spray it.

Regarding the idle screw,you wrote, "so i turned the idle mixture screw clockwise all the way". 2 things:

1. I hope you didn't screw it all the way in HARD. You can damage the tip of the screw, which is actually a point.
2. I hope you didn't leave it all the way clockwise.

Tighten it clockwise, but slowly and only enough where you feel the screw bottom out (that is, you can feel resistance). Don't continue to screw it in or you damage the point of the screw inside.

Next, turn it counter-clockwise about 3 360 degree turns (top of screwdriver is on top, you turn it so the top is again back on top = 1 full turn). Do that 3 times. That'll get you about where it should be.

With the car warmed up, you should be able to adjust it to where you hear it at it's highest idle. If you have a tachometer, then as you turn it, you should see it go to 850 (plus or minus 50) RPMs for initial idle speed, 930 (plus or minus 50) RPMs for idle mix speed in neutral according to the 1975 service manual. I'm sure people here can let you know if those RPMs work for them or if they set it differently then the 1975 manual.

You might also want to check your timing if you have access to a timing light. It should be at 10BTC. I would do that first before adjusting the carb or you will have to readjust the carb after.

One last thing I can think of is to get a carb rebuild kit for like ~$30. It has all the replacement gaskets and a few other parts.

I think you said your carb is Aisan 28150, and the 26xxx are listed for 1975, so I am guessing you have a later Corolla, maybe ~1978? So the RPMS listed above may be a little different for your model, but should get you in the ballpark range.


BTW, I was using the info that is listed in the 1975 preliminary service specs manual from Toyota. It lists 3000 RPMS (plus or minus 200) for the FAST Idle adjustment (that is, with the air cleaner on and you start the car, the car will FAST idle of ~3000 RPMs for a few minutes before dropping down to around ~800-900RPMs as listed above. This is why you do it after the car is warmed up.

Hope some (any) of that is of some help to you and if I got anything wrong, someone can correct me. I'm learning, just like you! Good luck!

[BOBLOOK]

Thanks VinceG2 for you update

[781masshole3tc]

update: i can idle YIPPI! after clearing the 2 1/2 feet of snow off the car i continued to mess with the carb, while it runs on first warm up i noticed the top choke pull off (the one with the 2 vacuum hoses) pulling in and out causing the carb to act crazy then when it warms up itll stall, so i disconnected both hoses off of the top choke pull off and stuck screws in them to plug and the is not stalling, will it only be the choke pull off that needs to be replaced due to erratic push and pull effects or is there something else that needs attention. i am extremely excited for this but even more im waiting for a phone call about a new and better job allround that i already had to interviews for which means i might have this car road worthy by the summer.

[781masshole3tc]

lousy crappy AISAN carb garbage, i went outside since its been sitting all day since yesturday and wont stay idling on warm up and when fully floored its a bog machine, i guess it is what it is, im not going to bother rebuilding it, im just gonna replace with Weber when i get the funds for it, i was hoping it would continue running like a champ like it did the day before but its still dogged. oh well.

[781masshole3tc]

i have loads of patience with this carb, grant it the cold weather helps with the trial and error of adjusting this carb and distributor with the quick cool down because its 26* degrees outside so all day pretty much each couple of hours ill go outside start it up and turn screws (lol) now its been a couple of hours since i last started it and it seems to be running great, not too high of the first cold start up then a nice warm kick down and a nice warmed up idle, so far im pretty pleased with the out come for tonite, the true test will be after sitting all night for a fresh start up in the morning since itll be 9*degrees outside.

[781masshole3tc]

well constantly fiddling with this carb, but what i have noticed when it warms up and idles down and then stalls ( i have to pump the gas pedal a bunch of times while turning the engine over for it to start up again) any ideas about that.

[BOBLOOK]

Did you follow those steps to set the idle

Sorry for my lack need to make an DIY build give me some times

Here an small guide not the same carburetor but the principle remain the same.

* Engine most be cold.
* Engine off.
* Untight the red arrow 3x screws from the electrical choke housing.
* Operator the throttle open to WOT 2x times that way the choke cam can engage.
* Turn the housing counterclockwise until the choke plate close grey arrow.
* Start the engine rpm need to be atleast 900 to 1000rpm.
* There most be an screw on the back of the throttle linkage arrow blue there you can make the needed adjustments choke rpm.
* When engine warm up while running throttle open to WOT 2x then you can adjust the idle 750 rpm for manual and 900rpm for auto grey. arrow
* The mixture adjustment screw is an matter of feeling i would say screw full tighten and then 3 full rotation open.

Note: picture is not my property google.

[781masshole3tc]

yes sir bobby, the choke seems to work great as well as the idle mixture and cold idle speed screw so it goes through all the cold fresh start mods very well and as it warms up idle kicks down lower on its own nicely and eventually stalls, so i quickly open the stock air cleaner to see choke positon and its wide open like it should be on warm up and closed on cold fresh start, but as i said when warmed up and stalled i have to pump the gas pedal at least 8 times to get it to start again (it does have a new fuel filter and fresh gas in it) any ideas?