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I have searched and searched and have yet to find an answer to my problem . I have a 2003 honda civic SI EP3, I recently swapped out my high mileage engine (K20A3) and replaced it with a JDM K20A. I used the original K20A3 harness and swapped over all sensors everything plugged in nicely, I had the PNF ecu KPRO'D V4. here is the issue Im having as soon as I start the car it runs for approximatelt 3-4 seconds and then just abruptly die. it will start up everytime but does the same thing everytime. I checked fuel pressure, spark plugs and ground, I checked and double checked all sensors and connections . I checked for power at the fuel pump and injectors and coils , I removed the he engine and checked the timing, I tried many different basemaps and result still the same. It has been over six months of searching the forums and still no positive results at this point Im willing to try almost anything I really need someone who has had this problem and or knows how to fix this problem to chime in

Any help would be greatly appreciated
 
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