Help....91 Turbo... [Archive] - Toyota MR2 Message Board

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I did a jdm 3sgte swapped on my 1991 Mr2 and now it wont start. Here is the problem: I have to 2 body harness, 2 engine harness. If i use the USDM body harness and engine harness it will start, but it will run really weak and very rich on gas. And if I try to floor the gas pedal than it would stall. If i use the jdm harness and other body harness than it wont start. It will crank but it wont start. I diagnosed it and the codes: 12; 24 and 51 came up.