Sr20det MAF problem

[boycelaforest707]

Freshly installed SR20DET problems with MAF...
Check the wiring from MAF to ecu, wires are correctly wired to pins 16,17 on ecu and wires are good.

Here is the problem:
I get NEGATIVE .6 VOLTS key on engine off from middle ground (black) to signal wire (white). If I unplug signal wire (PIN 16 from ECU) then I get 0 volts.

My middle ground on maf connector and ECU does not go to CHASSIS ground.

My question:
What would cause this? Bad ECU? Some ECU ground?
Also should these pins go to chassis ground somewhere or is there a seperate ECU ground?
13-GROUND
29- SENSOR GROUND
39 ECCS GROUND
48 ECCS GROUND

[RACETUNE]

Your questions:
What would cause this? anything electical.
Bad ECU? yes that is a possible.
Some ECU ground? yes that is also possible.
Also should these pins go to chassis ground somewhere or is there a seperate ECU ground? yes you can hook all those grounds to chassis ground.

[boycelaforest707]

chassis grounded, problem fixed! Runs great!