So before putting my manifold back... I was looking thru all my connectors making sure they're all there. I have the tps and map sensor aside. I believe the iacv is a green plug with yelw blue/ blk yelw wires. There's 2 plugs left I know one of them is for the iat sensor, but Idk about the other. Both are 2-wire connectors- one is orange wire and yelw blk; the other connector is orange ylw and green blk. Which is for the intake air temp sensor and what does the other plug do?

 

88-91 sensor wire colors:

EACV (IACV) - 2-wire connector (if car was DPFI, the connector is green) - one Blue with Yellow stripe and one Black with Yellow stripe
IAT - 2-wire connector - one Red with Yellow stripe and one Green with White stripe
Tandem Control Valve (on DPFI only) - 2-wire connector - one Solid Orange and one Black with Yellow stripe
TPS - 3-wire connector - one Yellow with White stripe, one Green with White stripe and one Red with Blue stripe
MAP - 3-wire connector - one Yellow with Red stripe, one Green with White stripe and one Solid White
FICV (Fast Idle Control Valve on 89-91 D16A6 only) - 2-wire connector - one Black with Yellow stripe and one Solid Blue
Cooling Fan Switch - 2-wire connector - one Yellow with Green stripe and one Solid Black
TW Sensor (Coolant Temp for ECU) - 2-wire connector - one Red with White stripe and one Green with White stripe
Temp Gauge Sending Unit - 1-wire connector - Yellow with Green stripe
Oil Pressure Sending Unit - - 1-wire connector - Yellow with Red stripe

 

Ahh OK that clears things up, the orange wiredconnector is not uused in mpfi, I think.


Also there's another wire coming from the harness that's on the passenger side shock tower,its a bblack and white wire with a butt end connector, what's that go into?

 

my guess is that it goes to the starter - only thing I can think of that is Black/White

 

This is the best thread......ever.

 

I agree, especially with the location it is in.

 

Looks like starter wire.