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      03-07-2019, 09:30 PM   #8
cjm41
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Drives: 2010 E92 M3
Join Date: Sep 2018
Location: Southern California

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Quote:
Originally Posted by Solo_M_Tech View Post
The exhaust leak is making the car enrich the fuel mixture. The leak allows the faster exhaust velocity inside the pipe to create a pressure differential, allowing fresh air to rush into the pipe. The car thinks its running lean so it enriches the mixture.

Get the leak fixed.
There is no more leak. There has been for the last, who knows how many miles. Since i bought the car. I drove it 5k miles with an exhaust leak spending hundreds trying to run it down along the way.

As of yesterday I have a new x pipe and no exhaust leak. This is when the running rich problem first appeared.
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