check the code for when you have a manual ECU in. The manual cars come with a different Idle Air Control Valve (2 wires vs. 3 wires) i think. So this makes sense your ECU is freaking out cus it doesnt have an auto transmission to control and your buddies ECU is freaking out cus it doesnt have the right IACV to control.
Code 70
Just did a manual transmission swap in my 97 civic coupe and I am getting a code 70 what do i need to do to get rid of the code. yes I am using an automatic computer but i plugged my friends 97 civic manual ecu and the check engine light still on and it had a wierd idle
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