Porous prints on larger prints (no replies)

Printer: Monoprice IIIP with Arduino Mega 2560 and Ramps 1.4

Firmware: Marlin 1.1.0-RC8

Melzi board fried the bed connector and have replaced with the Arduino/Ramps board. Have worked to get it printing and am getting porous prints (see attached JPG)

M501 reveals these settings:

echo:Marlin 1.1.0-RC8
echo: Last Updated: 2016-12-06 12:00 | Author: (none, default config)
Compiled: Jun 4 2017
echo: Free Memory: 4639 PlannerBufferBytes: 1136
echo:V27 stored settings retrieved (398 bytes)
echo:Steps per unit:
echo: M92 X80.00 Y80.00 Z400.00 E99.68
echo:Maximum feedrates (mm/s):
echo: M203 X80.00 Y80.00 Z5.00 E25.00
echo:Maximum Acceleration (mm/s2):
echo: M201 X3000 Y3000 Z100 E3000
echo:Accelerations: P=printing, R=retract and T=travel
echo: M204 P100.00 R200.00 T200.00
echo:Advanced variables: S=Min feedrate (mm/s), T=Min travel feedrate (mm/s), B=minimum segment time (ms), X=maximum XY jerk (mm/s), Z=maximum Z jerk (mm/s), E=maximum E jerk (mm/s)
echo: M205 S0.00 T2000.00 B20000 X9.00 Y9.00 Z0.40 E7.00
echo:Home offset (mm)
echo: M206 X0.00 Y0.00 Z0.00
echo:Material heatup parameters:
echo: M145 S0 H180 B70 F255
M145 S1 H240 B110 F0
echo:PID settings:
echo: M301 P28.63 I1.75 D116.79
echo: M304 P452.12 I74.18 D688.86
echo:Filament settings: Disabled
echo: M200 D3.00
echo: M200 D0

Have tried setting the E up to get the correct 50mm extrude but it does no better.

New nozzle in hot end.

Using Cura to generate g-code and Repetier to print.

Any help would be greatly appreciated...