Car starts runs then dies

[stevlover]

Hello all

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

[Spunkster]

Have you tried the ECU on a known working vehicle?

[stevlover]

I havent tried it on any other vehicle do you think that may be a source of the problem by the way the ECU has KRO installed

[Spunkster]

You need to try it in another vehicle to tell you if it is an ECU issue, or something in your vehicle that is the problem.

[amoras10]

Your CAM's mismatch, your chain tensioner failed and you need to change it to new one and set right cams angle.

I had the same.