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I am going to finish a project that is to long overdue. I have a 93 coupe and a LQ-4 engine/T-56 I want to get together. To anyone reading this and willing to offer a virtual helping hand thanks. The engine bay is empty and the trans is gone as well. My first question is if you have done this swap did you go into the harness and remove the unneeded wires? Is there any reason to keep the old ECM or the wires to it? I have a Speartech replacement harness which has it own ECM and is supposed to be a 3 needed wire only to run harness which I believe are power start and fuel solenoid. So again can I delete the old ECM? Does it control any needed gauge functions? Yes or no? Can/should I strip out the fuel injection wires out of the under hood harness? If you have a write up if you point me to it I'd appreciate it. Thank you in advance. LS swap target.
Nice car. I believe the later cars like yours use the CCM to control the gauges and the ecm sends a serial data line to the ccm to tell it whats going on. Im not sure how you link the swap computer to the ccm, if its even possible. There are a few later model LS swaps on here, just takes a minute to find them. Good luck!
The later LT1 C4s used the engine computer to basically control everything. That's why nobody bothers swapping them.
You can do the swap and get it running and driving fairly easily.
You'll likely lose a lot of functionality throughout the car.
I do think I looked at Diagrams at one point and you can get a lot of things working again depending on the year.
For now, just remove the old engine harness and computer. Don't cut them. They should come out by removing connectors/fasteners without any cutting.
LS Swapers please help
