Sounds like a clogged fuel injector to me. It reported suddenly, so it's not due to some overdue maintenance, it has to be something gone bad.
Good luck!
Quote:
Originally Posted by TiAgX5
When was the fuel filter last changed?
Check the fuel rail pressure, simple 10 min test, $20 fuel pressure test tool. The test verifies idle/low load pressure, rate of rise and WOT pressure (when vacuum hose on pressure regulator is removed), shows filter, pump and regulator are OK.
If no dealer/indy you've been to has verified proper fuel rail pressure, you need to find a real shop!!!
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01' 3.0i E53 (M54) with 164,000 miles 
07' 3.0si E83 (N52) with 134,000 miles 
08' 3.0si E70 (N52) with 91,000 miles 
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