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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 12-23-2014, 02:34 PM   #1
Registered User
Join Date: Oct 2014
Location: Irvine, CA
Posts: 42
My Ride: 2001 BMW 330ci
Help..Rough Idle and car dies when accelerating - Codes listed

P0171 (system too lean bank 1)
P0313 (Misfire with low fuel)
P0300 (Random Misfire detected)
P0344 (Cam position sensor)
P0135 (O2 sensor Heater circuit bank 1 sensor 1)
P0171 (System too lean bank 1)

Can the DISA be ruled out? If DISA is broken the car will run crappy but not totally kill it..

What is the most likely culprit is cam sensor or fuel pump ?
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Old Yesterday, 10:07 AM   #2
Registered User
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 12,171
My Ride: '06 330CiC, '03 M5
DISA is not likely the "main" culprit, but could be a contributor.

Reset codes and see what one(s) come back first.

Get Freeze Frame data and warm idle Fuel Trim info.

Intake cam sensor can cause starting problems, extended cranking and other issues, but this may be an intermittent issue/

Read the first 2 links below in my signature.

Search YouTube for Scotty Smoke Test. Do what Scotty does, it will help with OBVIOUS vacuum leaks, but for smaller leaks you need to built a tester in one of the related videos.
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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