The generator matrix

 1  0  0  1  1  1  2  1  1 X+2  1  1  0  2  0  X  1  1  X X+2  1  1  1  1  1  X  1  0  1  1 X+2  1  1 X+2  1  1  X  1  1  2  1  1 X+2 X+2  1  1  0  1  1  2  1  1  1 X+2  1  2  1  1  1  1  1  1  1  1  0  1  1  1  X  1  1  1  1  X  X  1  X  1  1  1  1  1  0  2  X  1
 0  1  0  2  3  1  1  0  2  0  3  1  1  1 X+2  X  X X+1  1  1 X+2 X+3 X+2  0 X+3  1  3  1  X X+1  1  X X+3  1 X+2 X+1  1  2  1  1  0  1  1  X  X X+1  1 X+2 X+1  1  0 X+2  3  1  3  1  1  3 X+3  1 X+3 X+3 X+3  2  1  1 X+1  0  1 X+3  1  2  3  1  1 X+1  1  X  2 X+1  X  X  1  1 X+2  1
 0  0  1 X+3 X+1  2 X+1 X+2  1  1  3  X X+2  3  1  1  X X+1  3  X X+3  0  0 X+3  1  0  2  3 X+1  2  1  1 X+2 X+3  3  X X+1  3 X+2 X+3  2  3  2  1 X+2 X+3  2  2  1  X  X X+1 X+3 X+2  0  1 X+3  X  X X+1  2 X+3  3  2  X  1 X+2 X+1  2 X+1  0 X+2  1  1  X  3 X+3  2 X+1 X+1  3  0  1  0  1  3

generates a code of length 86 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 84.

Homogenous weight enumerator: w(x)=1x^0+216x^84+144x^86+94x^88+32x^90+20x^92+3x^96+2x^112

The gray image is a code over GF(2) with n=344, k=9 and d=168.
This code was found by Heurico 1.16 in 3.08 seconds.