speedracer2536

iTrader: (15)

i have a 94 obd1 car.. my harness is jacked up.. will the harness out of a 96 or 97 work with my car? are the connectors the same? they are both manual transmission harness's

RamAir95TA

iTrader: (2)

It would be much easier to run a 94 harness.

shbox

You will have some extra connections on the late harness, like rear O2s, crank sensor, EVAP vacuum switch and the coil connector won't match. You would have to keep your opti harness, too.

speedracer2536

iTrader: (15)

but otherwise all the other connections are the same?!? i am switching to a vented opti so i have the new connector.. as far as the coil connector goes are all the wires the same the shape of the connector is different or what? could i just move my connector to the new harness? i have an msd coil so i would like to keep it.. but worse case couldnt i buy a coil from an obd2 car?

Rob94hawk

iTrader: (1)

I'm switching to a 95 opti as well but the only thing you need is a new opti harness and stupid vacuum tubes (which I'm not putting on.) Oh, and a longer cam dowel..

http://www.optisparkharness.com/opti...s/default.aspx

shbox

Yeah, I think all the others match up.

You can compare wiring differences of the coil connectors with schematics on my Tech Page.

speedracer2536

iTrader: (15)

shbox i tried comparing what you were saying on your page and cant figure it out.. could i just buy a coil for a 96-97 car and run it?

flame

iTrader: (13)

There are some differences in the wiring so have a look through the connectors in the link http://shbox.com/1/harness_connector_faces.htm

flame

iTrader: (13)

So by not using the "stupid vacuum tubes" you will have successfully made the first vent opti into a non vented conversion. You are defeating the whole purpose of making the swap by not putting the hoses on.

fex77k

iTrader: (2)

Run the vent lines cause they will keep your opti alive.

1961ba427

iTrader: (26)

I'm pretty sure you WANT to put those vacuum tubes on.....that's the main thing that makes the 95+ opti better. It's the vent system that helps keep moisture out.

OP: I am pretty sure just switching the coil to the obd2 style or switching the connectors and keeping your current coil will both work fine, but I'm sure the others have much more lt1 knowledge than myself.

shbox

Yes, you could.

1961ba427

iTrader: (26)

shbox, I have a 97 but swapped to a 95 pcm and knock sensor a few months back. It's running fine, but I noticed that not only is the coil different, but also the ICM carries a different part number. I'm still running the 97 coil and ICM. I know the coil is fine as-is, but is there a compatibility issue with the 97 ICM and the 95 PCM??

OP: I'm thinking it's okay to ask this in your thread since it's kinda relevant and may or may not be something that you have to consider with your harness swap. Otherwise I'd have just started a new thread.

RamAir95TA

iTrader: (2)

What's the point in converting to a vented optispark without using the vents?

Rob94hawk

iTrader: (1)

I'm probably gonna. What's another $70....

speedracer2536

iTrader: (15)

vaccum lines are not 70 bucks.. you could make a new setup at vatozone for 10 bucks..

RamAir95TA

iTrader: (2)

Not with the correct diameter tubing, flow reducer, backflow prevention valves, and elbows. Sure you could just throw any old tubing on there, but the FR and BPV are extremely important in keeping your optispark oil and crud-free.

speedracer2536

iTrader: (15)

Ahhh i stand corrected.. sorry for the misinformation i had no idea it was that intricate..