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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 03-02-2012, 05:03 PM   #1
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Join Date: Mar 2012
Location: Virginia
Posts: 1
My Ride: 2001 BMW 330Ci
330Ci P0171, 0174, and 0455 code help

I have a 2001 330Ci with a P0171, 0174, and 0445 code in. It stalls a lot in the first few minutes it's running, and seems to almost be holding back a lot of power sometimes when it runs. I've already checked the gas cap, trying to figure out where to go from here, any advice?
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Old 03-03-2012, 10:36 PM   #2
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Join Date: Feb 2012
Location: Florida
Posts: 55
My Ride: 2005 325i
P0171 and p0174, just had those codes bank 1&2 are lean. It was my lower intake boot. Just changed it yesterday and so far it's driving better. Every now and then before I changed the boot, my car would sputter. Now it's not doing that. Usually ppl will tell u it is an o2 sensor. But check the boot FIRST!! Hope that helps!
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Old 03-03-2012, 10:42 PM   #3
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Location: Florida
Posts: 55
My Ride: 2005 325i
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