Lets see how am i going to put this.I have a 92RS that I'm putting a 91Z-28 engine in.I know the differences in the actual engine harnesses and ecu's,now my question is how different are the wires in the dash.I'm taking everything out of the z and marking the wires as I go but will i need to use the underdash harness from the z or will the RS underdash harness just plug and play so to speak.I'll find out when I actually start pulling the dash in the RS apart but was hoping someone could awnser this now.Thanks in advance........jt

------------------
92RS

 

ECM to engine - different.

ECM to dash - same.

------------------
82 Berlinetta, orig V-6 car, now w/86 LG4/TH700R4. 2.93 limited slip. Cat-back from '91 GTA, ZZ3 intake, Accel HEI SuperCoil. AMSOIL syn lubes bumper-to-bumper. Daily driver, work-in-progress (LG4 w/'87 LB9 block, ZZ3 cam, ported World 305 heads, Hooker headers & y-pipe, 3" Catco cat & 3" cat-back, Spohn SFCs).
57 Bel Air, my 1st car. '66 396, 9.7 CR forged TRWs, Weiand Action+, Edelbrock 1901 Q-Jet (Holley 3310 on the way), GK 270 cam, Magnum rockers, Jacobs Omnipack, 1-3/4" Hedders & 3" Warlocks, TH400 w/TCI Sat Night Special conv & Trans-Scat shift kit, MegaShifter, 3.08 8.2" 10-bolt w/Powertrax, AMSOIL syn lubes bumper-to-bumper. Idles smooth @ 600 RPM in D. Best 15.02/95.06 @ 5800' Bandimere (corrected 13.93/102.4 @ sea level).

 

Ok,so let me get this strait...the harmess under the dash of my RS(tbi)will just plug into the TPI ECU with no splicing.So basicly all I have to do is Pull the engine,harness and ecu...replace the engine,harness and ecu in my RS with them and everything will just plug in?For some reason it just doesn't sound that easy,theer has to be something else.I know I have to do the fuel pump and a few other things but there has to be more to it.

 

Why? Isn't that enough?

 

lol...yeah thats great!but usually when someone makes it sound that simple it never is.....

 

I just took out my TPI, ECM, and harness. The only wires that go from the ECM up into the dash go to the ALDL port. I am 98% sure of this, so if anyone else knows different please speak up.



------------------
Joshua Johnston
1991 Z-28


350, T-5, K&N, Ported Vortec heads, Edelbrock RPM, Holley 750 D.P., HEI, 11.07:1 CR, Comp Cams Roller-.510"/.520"-282*/288* dur., Shorty Headers, Dual 2.5 Exhaust,Dynomax Bullet Mufflers, T&R Motorsports custom air intake

 

This would be most helpful in my situation. I've got an 84 I'm doing a DFI'd miniram swap into. I dont' need anything in the PCM right, oh, and car is an original 5speed car. now a t-56