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I am finishing up my Elise S. I have installed a 2zz in this 1zz car and am trying to get my aftermarket ECU to run but it’s not happening. I am told that I will need to do a couple of changes to the loom at the ECU to get it to work. Can anyone help with some information ?
 

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2005 Elise LSS Saffron Yellow
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Wow. That's a big jump. I think everything you need is in the 2000-2006 Toyota Celica shop manual, as the car came with both engines depending on trim level.
 

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Have you tried to starting up the engine using stock ECU? I seem to remember the factory engine harness part number is the same for 1ZZ and 2ZZ
 
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