The only other active member with a running swap is Fosgatechevy who I also got in touch with about it, but he didn't really answer much and offered his pre made harness/module. I've pmed wtfb recently and a month or 2 ago but he didn't get back to me, maybe he hasn't been hanging around. The 05 and previous Cavaliers don't seem to have any crazy computer controlled things, they are just like the 3800s in how they run in respect to their donor cars, so I don't see why its different. All you have to do is change out the TB if you get an eco from an 05+ Cobalt/Ion.
In fact, the 85/86 stock throttle cable from a Fiero fits right up to the throttle body. Late 90s-05 Cavaliers all came with L61s which were controlled by a throttle cable. It can be done and if you are meticulous you can do the work your self. From what I understand it is a PITA to get the Fiero harness to match up with the later years engine/computer. The Ecotech is drive by wire like the late 2007->2010 3800SC whih means you have a lot of computer wiring issues that control the thottle and everything else. If it isn't then I guess megasquirt is the only way to go if I'd like to keep my gauges/ fuel tank/ etc stock. Why? I'd much rather keep my stock gauges/fuel sender and not have to hack up my tank/etc, so I'm wondering if this is possible. Thats how all the 3400TDC/3800 swappers do it, yet people say that the Ecotec is more difficult from the wiring standpoint.
This 2nd option is what interests me the most, except I want to find out of its possible to use the stock Fiero harness and wire in the Cavy ECM and engine related electronics. Those that are running, most run on megasquirt- and wtfb took the entire harness from a donor Cavalier and replaced all the wiring in the Fiero, with the Cavy BCM included/fuel pump and sender/etc. Theres about 5 or so running swaps here on the forum, everyone has done it their own way. I've been gearing up for an L61 swap (2.2 eco), but what I'm still lost about is the wiring. I need to swap out my 2.8 by late summer, I can't depend on it to get me around.
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