What blue connector? The choke wire? If you pulled the choke wire off and it works better- you need to investigate from scratch the choke operation. The electric choke is the best and easiest to set up. When the motor is cold, tap the pedal and the choke should snap shut. When the motor starts,the choke pull-off opens it a bit so it can get air for warm-up. After a while, the electric choke heats up, opening the choke all the way. Simple. The connector tab is famous for rusting and making the choke slow or inoperative. Sand the tab on the choke housing until it is shiny. Make sure the connection is good. I sometimes solder a wire right to the tab and then add a bullet connector a few inches away. That way the rust doesn't interfere. EDIT: if the choke is working correctly and the motor runs bad, but disconnecting the choke makes it work better, you may have carburetor issues requiring a cleaning at the least. So start by getting the choke dialed in as described above.
