94 B18B1 bottom end bored 20 over. B16A head. I've got about 8,000 miles on the motor. When I start it cold the air/fuel gauge used to go to rich and stay there until car warmed up. About a week ago I noticed it would show rich for about 2 seconds then it droped to lean and started idling rough, at WOT gauge peggs rich but somewhere between 4500 and 5500 rpm it drops all the way lean. Now when I start it cold it will die right then unless I give a little gas, then it idles 700 to 800 rpm. No check engine light and Fuel filter isnt that old. If you have ever done emission testing the exhaust smells like nox are real high (new high flow converter). Fuel pump is the original RS non vtec, does the gsr pump flow more? Any help would be greatly appreciated, thanks.