mass air upgrade help?

[87fox5.0]

hey i gut an 87 gt that im doing a mass air conversion to, i have the harness 19lb mass air meter and a compter out of an 88 lx. the mass air harness is a 4 wire harness w/ red black orange/blue and green/red wires. i assume that black red are power and ground and the other 2 are signeal wires but which one is positive and which one is negative? can anyone help. thanks

 

[SpartaPerformance]

If I remember correctly 88 is speed density also, I hope that's an 89 computer!

 

[liljoe07]

The Dark Blue/ Orange wire is the Maf Signal wire. Goes to PIN 50 at the ECM 60 PIN connector.

The green/red wire is the MAF SIGRTN wire, goes to PIN 9 at the 60 PIN connector.

As stated, make sure the ECM used is a MAF ECM.