John , this one has too many possibilities, first verify that all of the CA smog equipment is properly hooked up, Then look for a possible EGR issue, ( Stuck open) . If you remove the air cleaner and watch for the accelerator pump jets when you activate the throttle, you may be able to eliminate that possibility. Put a Vacuum gauge to the intake manifold and get a reading at idle, and then watch when the throttle is opened. The gauge should read a steady 11 to 17 inches of vacuum at idle and drop as the throttle is opened. A fluttering or low reading at idle is the first clue. More after the verification of fuel , pumps squirting , and elimination of vacuum leaks that may be present. There could be stuck temp control TVSS vacuum valves issues too. More on that later.
Start with the basics ..
Pintosopher