i have an 86 pickup with the 22rte engine. Rebuilt about 6,500 miles back and has 210,800mi on it. Recently after warmup the check engine light has been coming on, but not all the time. It only happens sometimes. When it is on if i shut the ignition off and then start it up again the light is off. What could Be causing this. (I have good oil and fluid levels, afm is connected). Thanks for any help.

 

Check out this link:
http://www.off-road.com/toyota/tech/codes/

You may in the future want to try searching. Check Engine Light (CEL) questions show up a lot. If you find out what the source of the problem is with the above link check out and see what a search will yield.
If a search doesn't help you out post another question and I'm sure there are others with similar experience who can pass on what they did to solve the situation.