My ECU does not exist
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My ECU does not exist 
I just bought FC RX7 with a Gen 4 5.3 bored to a 5.7 and am trying to figure out what ecu I have so I can begin searching how to install air conditioning. I need to know what vehicle I can get the climate control and wiring from. Yes I have searched but can not find this ecu anywhere. It is a 16620610, which I found commonly for 99-02 Camaro's, BUT the other number is 09385721. Everything I've found is a 09354896. I can not find what ecu this vehicle is from. Thank you
You are missing the Service No. label. That IDs it more than the Hardware No. And that is a Gen 3 PCM, To use it with a Gen 4 you have to either change the crank reluctor to a 24x and the cam reluctor to a 1X or use a Lingenfelter converter box. Find someone with HP Tuners and read the calibration out of it and see what vehicle MY, type, and OS it is programmed with. Many different vehicles use the same Service No and Hardware No. PCMs, just with different calibrations in them specific to the vehicle.
Thread Starter
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Joined: Jun 2017
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Thank you so much for your reply. So I need to read the information from the ECU with a tuner to find out what vehicle it is from, and I can then find air conditioning parts from that vehicle and look at the pin out?
Just remember, he said that's a GEN 3 ecu and you have a gen 4 motor. It would be easier to get a gen 4 ecu than try to use that one.
