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6 Series
The BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations. |
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#1
08-21-2010, 01:20 PM
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645 Sputtering at low speed and rpms
I have a 2005 645ci 40k miles. Has anyone experienced sputtering and hesitation at lower rpms? It almost feels like a backfire. And at times it happens at regular intervals like its a misfire. Dealer didn't find anything when hooked up to their computer. Idol seems smooth.
THX 
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#2
08-21-2010, 03:32 PM
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Yeah my car does the same thing... It's intermittent for me though, so when I took it to the dealer they weren't able to duplicate the issue. If stomp on the gas a little bit it goes away. Try it. I don't think you have too much to worry about.
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2005 BMW 645CI - 20 Inch ADR Classic - Matte Black Side Fender Grille - Matte Black Front Grille - 20% window tint - Smoked tail lights - ACS Paint - Britalman full catback exhaust system - H&R Lowering Springs - aFe intake - Sprint booster - Ram air induction-Headers - MTEC white Angel Eyes - Two Alpine 12" Type R subwoofers - Rockford Fosgate T10001bd Amp - Escort Passport 9500ix Radar detector . 2005 Mustang Saleen 2005 Cadillac Escalade EXT 2007 BMW F800ST 
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#3
08-21-2010, 03:57 PM
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Yea it comes and goes. One day it does it. The next it is fine.
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#4
08-21-2010, 08:38 PM
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bad fuel? just a guess...
try having the injectors cleaned... that may help... I think somebody here just did...
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07 650i Cabrio CPO, Titanium Silver Black Matte Grill Dark Birch Wood Interior and Shifter HUD, Cold Weather and Sports Package Logic 7 Sound Aluminum Racing Pedals K&N Air Filters Rays Master Piece REM 20" Forged wheels w/ Conti Extreme DWS
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#5
08-22-2010, 05:53 AM
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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."
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#6
08-22-2010, 07:20 AM
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Ive got the same problem on my 2005 645cic. Ony 11,000 miles. I think it is bad fuel or need injector cleaned.
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#7
08-22-2010, 08:13 AM
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Great, I'll give that a try. Thanks for the help.
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#8
08-22-2010, 08:46 AM
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I hv the same problem.
Mine at 60km/hr @1300-1500rpm It kinda ease the problem with the air con on. Does it solve your problem after the fuel injector cleaned?? Can I use something like the spitfire that pours into the fuel tank???
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#9
08-22-2010, 10:07 AM
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Additives
Hi
Most of the additives are rubbish, but there is one which is used by some major prestige cars on their service and it is GK44 which is readily available in the US. I have used this in my car and is brilliant, not cheap to buy but worth it every 15-20K miles to keep the fuel system clean
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