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Tuned ECU bogs but stock ECU runs fine

1K views 4 replies 2 participants last post by  DC4Espinoza 
#1 ·
I have a 94 Integra with B20B swapped in and FBO with and upgraded fuel system, I’ve had my car tuned for over a year now running fine. Haven’t done any mods or maintenance what so ever in a month of two. My car started out shutting off randomly while driving, low/high speeds. Thought it might be an electrical problem but found nothing wrong and also no mechanical issue that I found. But now it throw a check engine like and starts jumping revs and when I start to drive it dies. It’s doesn’t show me the code it’s it’s throwing. I would swap the stock ECU in and this whole time and had no issues with the stock ECU it ran fine. So I’m pretty positive it’s the ECU but anyone have any idea on why this could’ve happened so it doesn’t happen again.
 
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