ok i have two questions on the vafc installation into my 91 civic dx with obd0 ecu. 1. where does the VTM wire connect to, i know u can see it on the updated apexi site but that is all for obd1 and obd2 ecus. 2. there are 2 ground wires from the vafc that connect to the ecu harness on the same wire, is this right?

 

u dont use the vtm wire

yes there are 2 wires that you hook up to the same wire, however one wire needs to be connected closer to the ecu than the other ground, problem is i dont remember wich one but the manual should be very specific about wich wire.

 

brown closer to ecu...

also apexi shows the install for obd0

http://apexi-usa.com/productdo...c.pdf

page 17 top left corner(H1-a) of the wiring diagram is for the obd0 ecu...

 

the vtm signal is for the vtec oil pressure i believe and apexi says it should now be installed, so do quite a few other people