Cant get 1987 Sammi to met emissions because of exessive fuel. Told that the sonlenoid oncarb not working, have replaced carb and have same issue. What triggers that sonlenoid to function?

Thanks in advance for your help.

The carb is controlled by an ECU - which makes decisions based on sensors & vacuum readings. It could be any number of these things. How do you know it's excessive fuel? How do you know you replaced a bad carb with a good carb (and not another bad one)?

Post up your SMOG slip, where you didn't pass, and anywhere you were close to not passing. Do some Google searching under "Failed smog [insert what part failed here]". Replacing the CatCon tends to fix a LOT of the SMOG problems - but it's expensive, so I'd check with some of the cheaper things first. When was the last time you did a tuneup? Not just plugs & wires - an actual proper tuneup at proper tuneup intervals?

And - avoid the "I'll just replace the 02 sensor..." mentality. It's usually not the 02, and the O2 is EASY to test with a $3 multi meter. I use the method where the O2 is still in the vehicle, but you can pull it and use another heat source as well.
http://mr2.com/TEXT/O2_Sensor.html

Dont have the failure slip with me it's a the shop but carbon monoxide was supposed to be 1.5 running and read 4.0. The idle reading was to high also. Was told by both the shop and the State oz Az that reaqdings that high was fuel and more thaN liklely the carb. replaced the carb and was told that the readings were 14% higher. Returned the carb to the rebuilder and he is checking but says that it checks OK.

I just went throught this same problem with my 87 sammy.  Replaced the carb, 02 sensor, ecu....it ended up being the cat.  My reading went from gross pollutor to next to nil.

If your carb was running rich, it very quickly can destroy a cat.