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rumonk 
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Joined: 26 October 2009 Location: Canada Status: Offline Points: 41 |
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 Posted: 16 January 2010 at 9:13pm |
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well after pricing everything out i've decided it easier and cheaper to just do a swap. i picked up a '84 complete car w/a rebuilt duke. i dropped the engine in mine this afternoon only took me about 5hrs by myself to do, the more i work on this car the more i love it. i may be crazy but in 15+ years of working on my own car and this one is probably the easiest to work on. anyway i'm curious if i need to swap computers from my parts car to work in my '85 or are they identical? is there anything else that needs to be swaped over? i'm doing a straight old craddle out, put new one in.
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Dr.Fiero
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Joined: 12 February 2007 Location: Canada Status: Offline Points: 1726 |
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Posted: 16 January 2010 at 9:36pm |
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You need to move the entire harness onto the 84 engine.
Nothing on the 84 is the same as the 85. |
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rumonk
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Joined: 26 October 2009 Location: Canada Status: Offline Points: 41 |
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Posted: 16 January 2010 at 10:04pm |
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can't i just use the existing 84 harness and ecm and put it into the 85?
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Romeo
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Joined: 16 November 2008 Location: Canada Status: Offline Points: 3033 |
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Posted: 16 January 2010 at 10:42pm |
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'Nothing on the 84 is the same as the 85.' <- (now with hyperlink!) I'm not too knowledgable in the area, but that statement didn't sound good for your odds, bud. |
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Dr.Fiero
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Joined: 12 February 2007 Location: Canada Status: Offline Points: 1726 |
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Posted: 17 January 2010 at 9:56am |
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Strip your 'new' engine clean. Move what you KNOW is new (or at least better) from the 85 engine onto the 84.
Bulk of (if not all) the sensors should be the same. Though they MIGHT not be in the same position (might have to relocate a bracket, etc). Even the throttle cable (etc) MIGHT NOT be the same. Sorry I can't be more specific. I've only ever had ONE '84 brought here over the last almost 10 years! And it was a hacked up monstrosity, so it wouldn't be a good frame of reference. (oh, it smelled awful too!  ) |
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Capt Fiero
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Founding Member Joined: 12 February 2007 Location: Canada Status: Offline Points: 4039 |
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Posted: 17 January 2010 at 10:16am |
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THe Coil and dist shaft I belive are also diffrent. So you may have to re and re the dist shaft. The reason everyone is telling you to swap, is the 84 ECM won't plug into the 85 Harness at the cabin and if for some odd reason you did get the ECM to plug in, none of the other connectors would work right. Even the lighting and wiring to the fuse block is diffrent on 84-85 cars. |
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Capt Fiero
88 Fiero GT 5spd V6 Eight Fifty Seven GT V8 5spd. |
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Patrick
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Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 6 |
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Posted: 17 January 2010 at 10:17am |
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John/Dave, I know there's quite a difference between the 87/88 dukes and the 84/85/86 models, but it surprises me to hear that there's really that big of a difference between an '84 and an '85 in regards to swapping engines. I'm not saying there is or isn't a difference, I'm just saying I would've thought the swap would be rather straight-forward.
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Dr.Fiero
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Joined: 12 February 2007 Location: Canada Status: Offline Points: 1726 |
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Posted: 17 January 2010 at 10:24am |
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Pat: you've got BOTH years sitting there.
Go pop the hood on both. Just look at the bulkhead passthrough for the engine wiring harness ALONE is, and you'll see how totally different they are. |
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Patrick
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Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 6 |
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Posted: 17 January 2010 at 10:37am |
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No, I don't have an '85. I have an 87 and two 84 dukes (and two 86 GTs). Yes, way too many of these silly plastic cars... I'm not suggesting that the way the wiring harness connects at the firewall/ECM isn't different, but aren't the 84/85/86 engines basically the same in regards to the engines themselves being connected to the harnesses (as well as to the throttle cable, etc)?
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Patrick
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Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 6 |
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Posted: 17 January 2010 at 10:47am |
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John, I'm just afraid that Rumonk is going to read that and jump off a bridge! If he simply uses all the wiring harnesses from his original '85 Fiero, and nothing from the '84 engine/donor car, he should be good to go. No?
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Dr.Fiero
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Joined: 12 February 2007 Location: Canada Status: Offline Points: 1726 |
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Posted: 17 January 2010 at 11:17am |
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Correct. Which is what I said in the first place. Then he asked if could not use the 84 harness, to which I said.... nothing ON the 84 is the same. |
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Patrick
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Joined: 19 April 2008 Location: Vancouver Status: Offline Points: 6 |
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Posted: 17 January 2010 at 12:10pm |
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Fine fine, it just sounded rather ominous the first time around. . . . . Will someone please pull Rumonk down from that bridge railing!
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Romeo
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Joined: 16 November 2008 Location: Canada Status: Offline Points: 3033 |
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Posted: 17 January 2010 at 2:30pm |
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lol "The wiring, it's just too much man!" "Sir, please let other children on the playground bridge." |
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Never shift into reverse without a back-up plan.
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Dr.Fiero wrote:
