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E9x N55 Downpipe Install Rpm jumping
I ordered the n55 catless dp and installed it today. but when starting the car idles super rough, sounds like it’s cammed. rpms are jumping from 600-1100 until i drive it for a small amount of time then it drives flawlessly, it sounds amazing but when i shut it back off and start it again it does the same thing. Update, the next day car started perfectly fine and drove perfect. I then got gas turned the car off pumped it and turned it back on and the same thing happened but this time the car won’t accelerate. not sure what’s going on. is it because i need to tune it?
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