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Replacing ECM/PCM/ECU

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Old Oct 12, 2019
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Replacing ECM/PCM/ECU

Alright, so I bought this civic about a week ago. When you got in it started it idled rough/funny. It would be very shaky until about 1500RPM, then it would accelerate and act fine. After it warms up it would almost die coming to a stop.
The check engine light was on so I read the codes. There was a few, a misfire in multiple cylinders, P1607 was faulty ecm, and another one. So I cleared the codes, read it again and there was one "permanent code" which was the ECM. So I pulled the ECM and got the same part number re-manufactured unit off of Ebay.
Now, my question is, I heard you have to "reprogram" you key in order for the car to start?
How would I go about doing that?
I work at a dealership so I could have them do it, but can I just bring both ECM's there have them do whatever to make it work? Or??
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Old Oct 13, 2019
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Re: Replacing ECM/PCM/ECU

Pop the fuel pump relay out, bypass it, then drive to the dealer for programming or not.
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Old Nov 22, 2019
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Re: Replacing ECM/PCM/ECU

I had the same issue (faulty ECU) and brought the car to the Honda dealer $60 later all in fine
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