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Most of it will. Some of the problems you will have is the EGR valve, and the difference in sensors used. The 2.8 won't use a cam position sensor, the 3.4 does. If you are putting a 3.4 in a 2.8 that's not a problem. But if you are trying to use a 2.8 harness in a car with a 3.4 it is a problem. If this is an engine swap to replace a 2.8 with a 3.4, use the fuel injectors for a 3.1......not a 3100 though. The 2.8/3.1 ECM doesn't "like" the SFI injectors without custom tuning. It will run, but you will have terrible upper end and full throttle. I've tried it.

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15y ago

What else can I help you with?