Fuel injector cleanse, try it. Do two tankful treatments in a row. Consider having a professional fuel injection cleanse done. If that doesn't work, a bad injector may be likely. These engines should not hesitate.

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2006 BMW 650i
Titanium Silver, Black Dakota/Dark Birch Trim, 6sp Manual, Sport Pkg, Cold Pkg, Nav, Logic 7, Sirius XM, iPod Kit, V1 Hardwired
BMW CCA Member

Retired:
2002 Porsche 996 Coupe
2000 Porsche 996 Coupe
1998 BMW 540i-6
1997 Audi A4
1994 BMW 530i
1990 Acura LS
1985 BMW 325e
1983 Lancia Zagato
1982 BMW 320i
1980 Triumph TR7
1970s Vespa Grande Moped

"50 Years Ago, Cuba Voted For Change."