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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 02-08-2017, 05:35 PM   #1
Chr15jrr
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Join Date: Feb 2017
Location: Maryland
Posts: 3
My Ride: E46
Stupid random misfires...AGAIN

The codes I'm getting are 300 (random misfire) 1343, 1345, and 1347 (misfires on cylinders 1, 2, and 3 with fuel cutoff). I had several other codes prior to these which led me to watch a YouTube video and replace the valve cover gasket, all 6 ignition coils, and all 6 spark plugs. I'm down to these 4 codes and from what I'm reading I'm thinking I need a fuel pump. What do you guys think? It's a 2001 325i.

Also, my car is vibrating right now as I sit here. Not much, but definitely not normal. Through rpm's are steady at the moment.
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Old 02-08-2017, 06:21 PM   #2
jfoj
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Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 22,858
My Ride: 330CiC, M5, X5, E93
Need Freeze Frame and warm idle Fuel Trim info.

Every E46 needs a fuel pump IMHO. $145 and about 30 minutes, you will be glad you replaced it.

Siemens/VDO pump and sending unit from BMWParts.com or FCPEuro.

You will need 1 small worn drive hose clamp as well.

Might as well get a fuel filter, but the pump is more important to replace, do that first.

Read this - http://forum.e46fanatics.com/showthread.php?t=929501
__________________
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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Old 02-08-2017, 06:27 PM   #3
Chr15jrr
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Join Date: Feb 2017
Location: Maryland
Posts: 3
My Ride: E46
What's the difference between the sending unit and the fuel pump? I just seen both of them on amazon. The sending unit was $175 and the fuel pump was like $150.
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Old 02-08-2017, 06:34 PM   #4
jfoj
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Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 22,858
My Ride: 330CiC, M5, X5, E93
http://www.bmaparts.com/catalog-3/it...do/16146752499
__________________
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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Old 02-08-2017, 07:01 PM   #5
Chr15jrr
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Location: Maryland
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My Ride: E46
Thank you.
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