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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 03-23-2015, 10:35 AM   #1
Registered User
Join Date: Dec 2013
Location: Jonesborough,TN
Posts: 26
My Ride: 2001 330I
Holding back and rough idle at driving speed

Hey guys, I have a 01 330i and started this morning while driving my daughter to school. The low down, drive at reg speed the car acted like it was chocking its self and then just takes off and went back in fourth that way,at a stop sign it was shaking rough . Did a code check,misfire 2/3 cyl. Replaced plugs about 4 months ago,used Factory bosh plugs. Any ides would be great and thanks again
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Old 03-23-2015, 10:59 AM   #2
Registered User
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 16,095
My Ride: 330CiC, M5, X5
Assume your overnight temps were in the low 40's?

You need to read the first 2 links below in my signature.

Need to see Freeze Frame info if the SES/CEL/MIL is on and Fuel Trim values at both warm idle and a steady highway cruise between 45-60 MHP.

Read this thread - http://forum.e46fanatics.com/showthread.php?t=1057387

Read my "BMW 20 Questions" comments in this thread - http://forum.e46fanatics.com/showthread.php?t=1059972

Search YouTube for Scotty Smoke Test. Do what Scotty does or build a tester from related video. Remove the oil fill cap and make sure the crankcase fills up with smoke, put the oil fill cap back on and check for leaks around the valve cover, oil fill cap, dipstick tube and CCV hoses.

Also read this thread about a bad batch of possibly defective CCV valves - http://blog.bavauto.com/15170/bmw-m5...s-ccv-cvv-pcv/
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, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose temp switch O-ring - BMW #13621743299
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