I have a stock 1994 Camaro with a 3.4l V-6. My car has been running as though it is missing - poor idle, backfiring, sluggish acceleration... On some days I can floor it and it accelerates slowly, yet at other times, it runs perfect. However, this is an intermittant problem. I checked the fuel system, injectors, vaccum, ignition... no problems. Although... I DO have one... the 20 amp fuse for the air pump keeps blowing - constantly. What we be causing this, and how should I go about troubleshooting the short/ground?