[1LowToy]

The smog test sheet is telling you all you need to know. Look at bold print on the visual. Gas cap Fail. Timing Fail.

New gas cap= easy job

Set timing to specs. May not be that easy as your timing mark is actually behind the water pump. You need a digital timing sensor to go down between the the block and the water pump. I don't know if this tool is available at you local Kragon or autozone on the too rental program.

After the timing is brought back to spec the carburator idle will likely be too low. Set to spec. Idle enrichment screws may also need to be adjusted.

With the timing too far advanced the carburator idle is not set correctly and your getting too high of an HC reading at idle. If it were a bad catalytic converter your emissions would also be high at 2500 rpm.

Keep in mind the '86 model likely have a feedback carburator. Meaning that the carburator at mid range mixture control is being monitored by and adjusted by the onboard computer. The carburator has to be adjusted within range of the computer's control. If not the engine light will come on.

I you have a smog shop perform the adjustments needed just don't try and screw with it afterwards and it should be fine.