i know the engine harness is seperate from the harness that plugs into the ecu...my car is a 94 dx(no vtec) iv been using an msd activator thingy. how hard is it or what would it involve to get the wiring from the ecu to the engine bay harness outof a 93 SI and into my car? i stripped my car. and im about to remove the dash. im sure that will make it easier. and there is a 93 si in the scrap yard with fresh everything. has anyone ever done this?

 

if you got everything out like you say it should be a simple plug in harness. vtec is only like 2 wires thouhg and there are tons of diagrams on wiring them. easy just wire those 2 from the ecu straight into the bay and connect them where they go.

 

I've removed that harness a few times stripping cars. It runs all the way from the ECU under the battery tray right up to the horn. It also runs all the way across the inside of the firewall. Its a very straight forward swap, just time consuming because it requires removing so much stuff.

 

i pretty much did the same thing i have a 93 honda civic hatch dx non vtech or course so i took the whole under dash harness and dash from a 92-95 civic ex and did a non power to a power conversion and worked it out great!. got power windows mirrors and locks and vtech worked perfectly .then i sold it like a dumb *** lol

 

after the messy msd box, i tried that. it didnt work. i only wired 2 wires though like you said...dont you have to wire 2 more to get it to work? for a gsr. where is vtec 5500? i took it all the way to 6krpm no vtec. ill try again though. becuase i hate taking off fenders

 

this thread gives me headaches

 

wiring stuff gives me headaches...wanna buy my honda? hahalol just kidn....kinda