[Dave Colangelo]

I would take apart the throttle housing and clean it up really well. Get in back to shiny metal, even the small passageway around the valve. I would also replace the fuel filter, and air filter. The air filter can make a big difference if it is even only a bit clogged. If the issue persists I would test your fuel pump's flow rate. This can be done by removing the nut at the end of the fuel rail, attaching a hose, and bypassing the DME relay to run the pump. I forget exactly what the rate should be but if you run it into a measuring cup and time it you can see what you are getting. The haynes manual has the numbers listed somewhere.

Regards
Dave