I recentlhy did a fuel injection service.

I recentlhy did a fuel injection service cleaning, through the intake plenum and in the gas tank. When I start the car when the motor is cold it idles fine but when I start to drive it acts like not gitting enough fuel. After a couple min it doesnt do it any more then when its wormed up and I come to a light I push in the clutch and the rpms jump up and down a couple times then goes to about 800 rpm. Also when im at idle I push the clutch in and push on the gas the rpms will start to drop like norm then it will jump up to 1500 or 2000 rpms then go back to 800 rpms.