Poor Fuel mileage - BMW Luxury Touring Community
 
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post #1 of 2 Old Sep 6th, 2008, 9:50 am Thread Starter
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Join Date: Jan 2006
Location: Knightstown, Indiana, USA
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Angry Poor Fuel mileage

I just returned from a great trip Southwest (4000 miles). Wow! was it awesome to see the Grand Canyon, Hoover Dam and ride in the mountains.

Just before I left, replaced my clutch (slipping) because of front tranny seal, I also replaced the temp sensor (what an idiot, the wire would not stretch).

The ole girl was running fine until about 500 miles from home. We had been riding all day and already covered 500 miles when fuel mileage tanked. She's idling rough with mileage down to 30 mph. No warning lights of any kind. Power at highway speeds is excellent (maybe even a little improved roll-on)

From what I have read, it sounds like an oxygen sensor problem. Does that sound like the most likely culprit or should I be checking other things as well?

Thanks for the help!
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post #2 of 2 Old Sep 6th, 2008, 11:03 am
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Location: Gold Country, CA, USA
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Re: Poor Fuel mileage

Sounds to me like the O2 sensor. That's the first thing I'd look at - but there are guys here that have forgotten a lot more than I ever knew in the first place, so you might get another idea or two.

Brian
CCR: 2008, Midway; 2011, Boise; 2012, Duluth; 2014, Chattanooga. MOA: Billings, 2015; SLC, 2017
CCR-R: 2018, Russellville
'13 K1600 GTL-P - "Eva"
Sold but "beloved" ride: K12 LT - "Pepe"
IBA #31242 (SSx2, BB, BBG)
MOA #136148

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