I have low pressure coming out of the right exhaust. The service engine soon light flashes constantly while driving but not while sitting still at idle. The engine is missing and loping badly. The only real code is an oxygen sensor code and I put a new oxygen sensor on it.

There's a small exhaust leak at the pipe that goes into the passenger side manifold where the metal pipe clicks in but that's the only thing

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~2003 X5 4.4i~