1990 harness questions (two pics)

[FattyBoomBatty]

Alright, in this first pic, I have the end of the harness with the four injector clips, the temp sensor and the gauge temp sensor wires and a mystery plug. Can someone tell me what the mystery plug goes to, and which injector plug is for number one?


This pic shows the plugs for the coil pack and transistor. I tried to follow the wires around, back to the ecu, but they go in and out of a couple of things, so they are hard to trace. I just want to know if I need to plug something into the two prong female plug with the arrow pointing to it.


Also, if I have anything wrong above, please let me know so I don't break something when I install it!

Thanks!

[Pushit2.0]

The green plug on the left is your #1 injector, your mistory plug on the top right should be your ECU coolent temp sensor(two wire deal). Pic #2 the two wire connector is for the break fluid resivior sensor(I think).

~John

[carltalon]

Top pic plug is for the O2 sensor. The bottom pic is for the noise filter for the 90 coil and transistor.

[FattyBoomBatty]

Sorry, I should have been more clear, the mystery plug has 4 wires, my bad.

Also, the little black one in number two, I traced both wires back and they both say, "ignition pulse detect" or something like that. What will that connect to then? I eliminated a lot of stuff and I think the brake stuff was included in the removal.

one wire from the black plug goes to the small yellow ecu connector, the other to the large white one that connects to the dash harness (in a dsm). both say ignition pulse detect. The site with some info that i've been using suggests unclearly that it could be a tach signal cleaner? What is that? Any more suggestions?

[FattyBoomBatty]

Ok, so that plug would normally connect to the transmission? how does that work for me since I'm putting this in my quest with no connection for it?

[carltalon]

No it plugs into the noise filter. the noise filter is intigrated into the 91+ transistor. But is separate on the 90.I guess I shouldnt abreviate

[FattyBoomBatty]

so I gotta get another part? that sucks.

[carltalon]

Originally Posted by FattyBoomBatty

so I gotta get another part? that sucks.

I might have one I'd have to look around. Do you have a 90 coil and transistor? And a 90 ECU?

[FattyBoomBatty]

yes to the coil and transistor, no to ecu, but I have a standalone I'm using instead.

If you have one that would be sweet. I'll buy it from you.

[carltalon]

I'll look around.