I am ready to start it up with my tuner and of course I screwed up the wiring and grounded my MAP to the chasis ground at the ecu instead of sensor ground. Which wire on the 90 - 93 MAF harness is the sensor ground?

The 94+ is black with a blue stripe but I dont have a wire like that.

 

I stupidly wired the Air intake temp sensor ground to chassis ground also but it is reading the correct temperature. It just goes to show that just like parenting, anyone can do it even if they probably shouldn't...

 

Does is matter which Sensor ground the Air intake temperature sensor and MAP sensor are hooked up to? 2C or 2D?

 

I checked the MAF harness and found ;

2P, ?, All four ecu grounds (2C 2D 2A 2B), ?, sensor ground 2D, Chassis ground 2A, 2A

I hooked the AEM map sensor to sensor ground 2D and it reads 1.61 volts at "0" psi, no vacuum, which is what it should be.

Yeah. For now.