Hey, So I have a clean 1984, the original duke went out. I now have an opportunity to buy a 2.8V6 with harness, cradle and ECM from a 1986. I was hopping someone could help me find a build thread on how to do the swap. Or just tell what else I need to do the swap. Thanks.

Don't you mean an 88 V-6?

It would be nice to grab the interior harness also due to differences in the wiring.

Manual or auto?

Build instructions? Whatever you take off the 86, put on the 84.

[This message has been edited by phonedawgz (edited 08-22-2010).]

I might be helping out with this swap if it isn't going to be a nightmare.
The 84 is in great shape, just missing the engine. It is a 4 speed.
The engine is an 88 2.8 with an auto. The swap will turn the 84 into a 2.8 with the duke's 4 speed. The cradle is an 86 from a GT. All the wiring from the V-6 is there.
If all the 88 wiring is used, what is the hard part on the 84 chassis? Just the fuel wiring? fuel pump? radiator?
I know the c500 has to be relocated and another hot supply for the second bank of injectors. Are there any other problems with this conversion?

Also, with the donor being an 88, will the flywheel from the 84 work? will it need an 88 flywheel/clutch?

Thanks.

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88 GT "The Stray" 4.9L
86 SE ChopTop 4 Speed 3.4 "The Short Bus" SOLD!
07 Solstice GXP 2.0L turbo
08 GMC Sierra 3500 Duramax Dually.
05 Tahoe on 20's (Kid hauler)

[This message has been edited by Carver1 (edited 08-22-2010).]

C500 and C203 pinouts are different. On the 84 all the power for the car runs through C500. You wont be able to just plug in the 88 harness, it will need rewired to match. I will see if I can find my 84 pinout info and post it here.


Not sure of the accuracy of these, as I remember there were some errors in them I had to figure out as I went. I made notes on the errors I will try to find and correct anything I found wrong. I've been meaning too anyway !

84 C203

Pin
A= Upshift light
B= Fuel pump power to relay
C= Check Engine light
D= A/C enable relay control
E= Oil light
F= HIR +12v fuel pump/ECM
H= 1/2 VSS signal from speedo
K= A/C from relay
N= A/C power from fuse to relay
P= TCC +12v when brake not applied
R= +12v when cranking

[This message has been edited by Mike Gonzalez (edited 08-22-2010).]

Mike Gonzalez, thanks for the pinout information that is going to be really helpful.

[This message has been edited by Mini_moosee (edited 09-07-2010).]

So, this is for anyone else that is looking to do this swap. The link at the bottom has a lot of great information on it.

https://www.fiero.nl/forum/A...020511-2-017686.html

You will need an 88 flywheel for the manual swap!

quote Originally posted by katatak: You will need an 88 flywheel for the manual swap!

Seems like I just had one of those somewhere around here.........Doh! I know where it went.

The ultimate guide to a V-6 Swap into a 1984

[This message has been edited by Mini_moosee (edited 08-24-2010).]

So yesterday I started the swap I will be posting pictures as I go through it. I would like to know what you guys think of it.

The Heartless




Added the TBI 1&2 wire with 5amp fuses.



Routed the TBI 1&2 wire through the dash along main wiring harness to the ECM


Interior work

[This message has been edited by Mini_moosee (edited 08-28-2010).]

nice cowl man. im guessing its only aesthetic?

EDIT: by the way i have the exact same car. color and options all the same. im doin a 3800sc swap in mine. keep us posted on this one.

[This message has been edited by 07Hoffmannd (edited 08-28-2010).]

Yeah it only aesthetic.

Wow 3800!! Good luck with it, seams like it would be a tough swap into an 84. keep me updated on it.

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1984 Red 4Spd "The Heartless"

[This message has been edited by Mini_moosee (edited 08-28-2010).]

Your Fiero looks like it's in really good shape. I bet the environment plays a role in that (i.e. not a lot of rain or snow). Is that the original paint?

Everything except the paint on the hood scoop is original. The car came from Iowa back in 2001 and his been sitting in a garage for the past 9 years.

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1984 Red 4Spd "The Heartless"

V6 attempt 2

[This message has been edited by Mini_moosee (edited 09-07-2010).]

I almost forgot, I have the V-6 air cleaner housing and the other parts I didn't use on my swap. Let me know when you get to that part. Get that thing running!

Haven't made to much progress, but once some money comes in I will try and get back on track.

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1984 Red 4Spd "The Heartless"
1993 Chevy Lumina "Lauren"

[This message has been edited by Mini_moosee (edited 09-07-2010).]

quote Originally posted by Carver1: Don't you mean an 88 V-6?

Nope I meant 86

quote Originally posted by Mini_moosee: Nope I meant 86

You got me there, smarty pants.

Thanks again for the engine stand. WAY easier!

So took of the oil pan today. The pan and filter was filled with a gooey mix of extra silicon and oil. This is could be way it was not getting oil.

So it's been along time since I updated on this. I have almost all the parts now just waiting on a bracket to come in. I should have the engine next weekendish.

Found out why the engine lost oil pressure. The drive rod connector broke into 3 pieces...