R22/10 ton A/C Split... Suction pressure 30psi, suction line temp 16 Deg. Unit looked to be flooding back, i had no super heat out of the evaporator. Air flow is correct. I know that because circuit 2 runs perfect the evaporator coil is all interlaced w/circuit 1. Knowing all this information i elected to replace the txv after making adjustments to the original had no effect. The new TXV failed to correct the problem. ...we did finally find it had 3 of 4 distributor tubes plugged w/silver solder from the factory. How or why would a restriction look this way?