2ga harness in a 2gb

[Cox Abele]

I'll be swapping my 95 auto harness into my 98 5-speed today to round out some of my awd/transmission swap.

From what I gather, some wiring will need changed. I am well aware of the CAS plug needing swapped. I've read that the I'd need to swap the plug wires and re-pin the injectors at the ECU, however I'm planning to run the 98 ECU which has me thinking I won't need to re-pin or wire swap. Aside from that, the side by side of the harnesses leaves little variation between the two. I do have an additional connector off the rear o2 branch of the 98 harness that is used for the fuel tank evap controls. Since I have a 95 tank, I'll be eliminating the trouble codes in ECUFlash, so there's no worry there. I also see some differences in the pins of the blue connectors located behind the radio, but have read these have no effect on anything.

My largest concern is the injector and sprak plug re-wiring. It's not difficult, but I'd rather do it before putting the harness in the car. Because I'm running the 98 ECU with a 98 CAS, is it still necessary to re-pin/re-route?

 

[Cox Abele]

When running a 1g or 97+ CAS I shouldn't have to swap anything, injectors or spark plugs.

 

[nuclearr]

Since you are using the 98 ecu you will have no issues running the 98 cas no ecu rewiring required.

I have a 99 ECU on my 96 harness just rewired it for the 97-99 CAS

 

[Cox Abele]

I'm curious, are you flashing your 98 ECU? Having it on a 96 harness, did you have to do anything to get your ECUFlash to work?

 

[nuclearr]

I'm curious, are you flashing your 98 ECU? Having it on a 96 harness, did you have to do anything to get your ECUFlash to work?

Yes I am I had to add a pin to the ecu. I have ecu connectors from a car I scraped so I pulled one out and put into my 96 harness. I do not recall off hand which pin slot it was.

 

[luv2rallye]

The 95 has MFI and FP relays together into one relay (and connector) where later has them separate relays.

You may have to jumper the starter relay as the AT relay works inversely as the MT one does. Also 95-97 has reports of different pinout and connector (4 pin) than later one. Also park/neutral vs clutch pedal position wiring different. Due to all this, just bypass the starter relay and be done with it.

ECU pin 91 is grounded on MT but not on AT. This is really just for AT control of IAC when in park/neutral however.

 

[acorn3583]

If I recall correctly, 95s are still OBD1 and 96+ are OBD2. I'm sure it depends on what parts of the harness you're using, but it should make a difference. Be careful and good luck

 

[eclipsyco]

If I recall correctly, 95s are still OBD1 and 96+ are OBD2. I'm sure it depends on what parts of the harness you're using, but it should make a difference. Be careful and good luck

95 DSMs are obd2 as well!

 

[casperfast]

If u had all it obd2. My 95new has an obd2 port, but it runs a "hybrid protocol" so lots of scan tools cant read it. Only v2.5 evoscan can even connect opposed to other evoscan builds. MOST car didnt get obd2 until 96.

 

[dsmcurse]

Bull$hit. All 95 eclipse/talon are OBD2. The 96 thing was the law when all cars were required to run OBD2. There were cars making the switch up to a year-almost two years prior to the 96 law.

Look at acura integra, it had a body-style production run of 94-01 (pretty good) and honda held out as long as they could 94-95 teggys OBD1 and 96+ are OBD2. Then ya got nissan 300ZX, body style production run 90-96. Nissan had 90-94's on OBD1 and prepared for the switch over a year early 95-96 are OBD2. Then ya got us, the DSM, body style production run 95-99. Mitsu went ahead and had all be OBD2. With the new body style change and the new law only a year away comin, mitsu just went ahead and had OBD2 right from the get-go

There's no 2G eclipse that is OBD1

 

[MathixPerforman]

ok, I know this is a bit late winded. I just put a 98 auto harness in my 95 auto. I can get it to run but it seems only on 2 cylinders. I am running my 95 ecu still. I think firing order is correct but was wondering if you have to change the injector wiring as well?

 

[boost97gst]

Still using the 95-96 cas?

 

[MathixPerforman]

Yes I am still using the 95 cas.

 

[boost97gst]

yea, firing order should still be 4123. That wont change unless you use a 2gb cas or a 1g cas. I would think injector order/wiring is the same too.