My friend has an obd1 p75 ecu that he got for an ls swap into an eg. The ecu kept throwing code 16 and the car ran on three cylinders. We put my obd1 pr4 ecu in and it ran fine, so I plugged the p75 into my car and it caused me the throw code 16 and run on three cylinders. I figured out that it was cylinder #3 that wasn't firing.

I know that the problem is in ecu, and I was wondering if there would be a way to fix it. I know that Injector #3 is pinout A5, could something inside the ecu be bad. I compared the ecu to another and it looks fine inside.

 

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