lalojamesliz

Yesterday I adjusted the valves and today I set the idle and timing. After I set the idle down to 800ish it would idle really rough and my vacuum was about 10-11.
So I set the timing and the idle went back up and I started turning out this screw on the carb and it the idle was smoother. What is this screw guys?

lalojamesliz

I remember seeing the 22r didn't have a idle mixture screw. I have a 87 22r

lalojamesliz

This is the idle set screw right?
I was waiting to change my leaking valve cover gasket (done) and I want to replace the valve cover breather hosed before I clean my engine

lalojamesliz

The carb looks dirty/yellow inside. I think that's another reason for the cold idle problem. I have to hold the gas down to keep my engine on until it warms up.
I've been looking at the "Toyota pickup idiots guide" to learn

old87yota

The screw in your first post IS the mixture screw. These screws were plugged up from the factory to encourage people to look for vacuum leaks or other problems before adjusting. Your plug has been removed (which just means someone has adjusted it in the past).

I believe your are correct with your second picture being the idle screw.

Remember to look for ANY vacuum leaks because that will effect your adjustment and could make adjustment impossible. Plug up any lines that you needed to remove.

Do you know if your choke is working properly? I also have an 1987 22r and have keep my foot on the gas until it warms up. I need to actually spend some time figuring out exactly what is causing the problem but I suspect the choke isn't working properly.

You might be due for a carburetor rebuild / replacement if these adjustments do not work out.

lalojamesliz

Thanks for confirming that is the mixture screw
My pcv valve is broken and I was doing these adjustments before I bought the new one. I haven't tried this with the new pcv valve.
I'll do that in 5 hours roughly when I get home from my job.
My vacuum advance won't hold a vacuum so I'm wondering if that has something to do with this problem also. If I unplug the vacuum lines from the vacuum advance it doesn't make a difference though.

lalojamesliz

I'm going to try this for cold start problems.

slow-mo

And as a side note, you have the California feedback carburetor.

edit to add: I don't know if the engine is running while your taking these pics, but you need to first plug that large vacuum hose port in your first pic, before setting your idle.

lalojamesliz

Thank you for the picture
My truck was off in that picture I first posted