My 2001 325i uses more fuel than indicated by the trip computer and smells of fuel after a journey, but presents no fault codes, though the long-term trim is negative on both banks (straight-6 engine). There are never fuel puddles or drips under the car. Also, I can hear the fuel pump squealing when I get to 2500 rpm, or so.
I looked underneath at the fuel filter and noted a broken vacuum elbow to the fuel pressure regulator built into the filter – could the pump be over-pressuring as a result? The filter itself is very old (30,000+ miles), but I don’t know how long the vacuum elbow has been broken. I am replacing the filter/reg later today.
In case this does not fix the issue, should I check for leaking injectors/seals?
- This topic was modified 2 years, 5 months ago by Mark Appleton.
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