Idle Problem

[lunap]

I have a 1980 FJ-40. It has been running great - starts right up, purrs when driving. Here's my problem - just recently as I am driving when I come to a stop light the engine stalls. This is only if I have the choke in - when the choke is out it does not stall, just idles at a high rpm.
I have noticed that after I have driven awhile and the engine heats up I can then drive with the choke in and it will not stall.
Is this even a problem? Or is it just the fall weather and the engiine just needs more time to heat up. Usually I have been able to drive after a block or so and take off the choke and it was fine.
Should I adjust the idle on the carb to compensate? Or will that open up some problems?

 

[IDave]

Check your plugs and see if they are carboned up. If they are, clean them, and think about leaning things out. Also, check your air filter. For starts.

 

[TJDIV]

I would tweak the idle adjustment.

 

[65swb45]

Have you noticed any other changes, like maybe an increase in engine temperature, or a decrease in engine vaccum? Any difference in the rate of deceleration with the truck in gear?

 

[bull]

same symptoms..but I start to overheat. Thoughts?

 

[lunap]

I have not noticed any other changes. It does not overheat. This weekend I will inspect the plugs and air filter and perhaps adjust the idle.

 

[Ming89FJ62]

Check for a possible intake manifold leak. Spray a little carb cleaner around the intake manifold when it cold (same temp as when you experience the problem) and see if your RPM's jump. Could be that after the manifold heats up is "seals" the leak. It may be as simple as a loose bolt. Hope so - easy fix.

Harry