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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 11-29-2012, 09:38 AM   #521
Stinger9
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All we want is for your car to run right.


From another post over where Rajaie runs the vanos symposium:

Originally Posted by 2003silver330i View Post
My 2003 330i (140K miles) has a rough idle upon initial cold start and stays like that for a good minute before smoothing out. Every other day when starting it up cold, the engine will run rough for a second and stalls out and dies. As long as the engine is somewhat warm it starts fine and the idle is not near as rough. I did the CCV test where you lay a zip lock back on top of the oil filler hole and it sucks in about an inch so I'm assuming the CCV is good to go.

Is it possible my VANOS seals need replacing? Thanks.
1" on the bag test is good.
Have you already replaced the crankcase vent valve and 4 hoses?

Here are things to consider.
1. Dirty idle control valve.
2. Crack in lower intake boot branch to idle control valve.
3. Crankcase vent valve and 4 hoses.
4. Failing DISA flap. Remove and inspect flap for excessive play.
5. Loose DISA fit to intake manifold. Wrap DISA base gasket with one layer 1/2 width electric tape.
6. Dirty or failing MAF sensor. Spray lightly with MAF cleaner and let dry.
7. Clogged fuel filter.
8. Very dirty engine air filter.
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Old 11-29-2012, 11:31 AM   #522
flyty017
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yeah i have codes their were 12 of them. All cylinders misfired and also 2 lean codes. i replaced the MAF sensor as well.
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Old 11-29-2012, 03:26 PM   #523
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MAF sensor is usually not the fix all, and many non OE MAF's under report airflow and cause lean conditions. Put your original MAF back in until you solve the problems.
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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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Old 12-03-2012, 07:30 PM   #524
Frank_E46
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Thanks jfoj...
Removed/Replaced fuel pump but only after failure. LUCKY for me she died on my driveway. (2005 325ci/110K)
Did some shopping around and BMA w/code had the best price and excellent fitment. The DIY is on youtube (edzgarage). But the one thing that should be included is that the electrical connector has a 'slide' (see pix). Rather than 'monkey gripping' and pulling--just slide and the connector just lifts up.

Last edited by Frank_E46; 12-03-2012 at 07:34 PM. Reason: updating pix
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Old 12-03-2012, 07:59 PM   #525
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Glad your car left you stranded in the driveway.

Just no fun if your car is blocking your running vehicles in!!

Thanks for the good picture. This style connector is common on BMW's and other German cars. If you do not mind, I may edit the first post and add this picture for the newer crowd that have not seen these type of connectors before.
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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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Old 12-03-2012, 08:26 PM   #526
Frank_E46
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...please do so jfoj.

I'm glad to humbly contribute to an excellent site...for me, that's the bottom line.

We're here to help each other out vice feed the stealership!
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Old 12-03-2012, 10:52 PM   #527
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Quote:
Originally Posted by Frank_E46 View Post

We're here to help each other out vice feed the stealership!
And get quality workmanship because we're doing things carefully ourselves!
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Old 12-03-2012, 11:11 PM   #528
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...here's a pix of the closed position:

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Old 12-03-2012, 11:12 PM   #529
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...and here's a pix of the open position:

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Old 12-03-2012, 11:13 PM   #530
Stinger9
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Exactly the way mine is.
And I wasn't surprised by it because the connector on the back of my stock head unit has a connector that slides sidewise just the same.
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Old 12-03-2012, 11:26 PM   #531
Frank_E46
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At the open position, the electrical connector is easily lifted vice 'monkey gripping' and yanking off like in the youtube video.
FYI, replaced the fuel filter at 80K.
This past weekend replaced:
*Fuel Pump: Siemens/VDO
*Fuel Tank Unit O-ring (fit ring in-place prior to sliding fuel pump in tank)
*Fuel Pump Relay
Get a new hose clamp: 1/4"-5/8" worked great.
Use a torx T45/50 to plug the fuel line and prevent fuel spillage.

Everyone has to make a decision 'when' to replace--hopefully, we're all lucky enough to be in a good position when it happens...
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Old 12-03-2012, 11:33 PM   #532
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Glad it was not a surprise for you Stinger9...it was for me.

I like informative threads that help our community and this is one of them.

Once again, thanks to all on this site that make owning, driving, and maintaining an e46 enjoyable!
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Old 12-05-2012, 11:57 PM   #533
ralf
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Just happened to me.

I was driving and suddenly the car started to fail, I just reached a parking lot inside a mall until my car died. When this happens to you, in a BMW thatīs rock solid dependable you start to think things like: why is this happening? Should i sell this car? but when the calm returns, one just have to think a little and find the cause. Whatīs missing here? fuel or spark? because the crank works but the car is not starting. After a quick check removing the injectors cover i noticed i didnīt have fuel pressure.

So, options are: faulty relay, clogged fuel filter or dead fuel pump. Itīs not the injectors because in that case iīd have a CEL code and I didnīt.

I had to tow the car to my home, search posts about this problem in this gold mine of information forum, and also found a video on youtube that was very handy.

Also, the procedure to change the fuel pump is very easy. When my car was being towed, i was thinking on the trouble to lower the gas tank because itīs over the driveshaft and differential, but when i found about it it really made me smile. The engineers of bmw are geniuses by making this repair that easy. I wonder if changing a fuel pump in an audi or mercedes is that easy.

Checked the relay first, it was ok, checked the voltage on the fuel pump harness and it was ok. but fuel pump was dead. Ordered a replacement and a new fuel filter (it was time to change it anyway) yesterday morning from BMA parts and surprisingly the box arrived today (it took just 1 day to travel from CA to TX) I installed the new filter and pump and my car is running again.

I have to give total credit to the creator of this post, because itīs true, my car is 131K and the fuel pump is the original. I never though on replacing it because it never failed. But eventually they all do. So itīs wise to plan replacing the fuel pump.

Luckily for me, the car failed just a few miles from my home. I imagine the problem if this happens in a road in the middle of nowhere.

So, be wise and change your fuel pump.


Last edited by ralf; 12-06-2012 at 12:02 AM. Reason: add comments
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Old 12-08-2012, 05:54 PM   #534
01330i
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'01 330i owner.
Car has exhibited the symptoms of the soft fuel pump failure, car ran out of gas still showing 1/4 tank. Put fuel in and it started right up.

Then sure enough my wife goes out to start it this morning and it cranks but no start.

Question, the O-ring for the Siemens / VDO fuel pump...says it needs to be ordered separately---did that---but it shows a "Sending unit O ring" in the description. Is that correct JFOJ?

Also, I ordered the Fuel pump relay and the Filter w pressure regulator.

Last thing, where is this F-pipe / hose you refer to in some other posts?

Thank you.
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Old 12-08-2012, 06:14 PM   #535
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Fuel sender/pump seals/O-rings are the same for both sides so you ordered the correct thing based on your description.

I reuse them all the time without problems, but not a bad idea to replace it.

Stupid expensive for what it is.

As for the F connector, not 100% sure all cars have these. Some cars have fuel pressure regulator connected to side port on CCV as I recall?
__________________
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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Old 12-08-2012, 07:24 PM   #536
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Quote:
Originally Posted by jfoj View Post
Fuel sender/pump seals/O-rings are the same for both sides so you ordered the correct thing based on your description.

I reuse them all the time without problems, but not a bad idea to replace it.

Stupid expensive for what it is.

As for the F connector, not 100% sure all cars have these. Some cars have fuel pressure regulator connected to side port on CCV as I recall?
Sorry ---- I've done several DIY's (window regulators, Blower resistor i.e),,,,and I don't have a clue on even the general area of this (possible) F-connector...? Under the hood? Or underneath the car near the pressure regulator,,,is that what you're saying?
Sorry for being such a pain.

And thanks again. Very much.
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Old 12-08-2012, 07:53 PM   #537
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Sorry for not being more clear. The F vacuum connector is mounted in the upper intake boot, which is connected to the MAF/air filter housing.

Also check/replace the vacuum hose to the fuel pressure regulator located under the drivers floorboard, connected to the fuel filter.
__________________
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

Last edited by jfoj; 12-08-2012 at 07:54 PM.
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Old 12-10-2012, 09:39 AM   #538
01330i
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Thank you. Much appreciated.
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Old 12-10-2012, 09:52 AM   #539
eRock79
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Quote:
Originally Posted by Frank_E46 View Post
Thanks jfoj...
Removed/Replaced fuel pump but only after failure. LUCKY for me she died on my driveway. (2005 325ci/110K)
Did some shopping around and BMA w/code had the best price and excellent fitment. The DIY is on youtube (edzgarage). But the one thing that should be included is that the electrical connector has a 'slide' (see pix). Rather than 'monkey gripping' and pulling--just slide and the connector just lifts up.
I just had to deal with a very similar problem that left me 30 miles from home and a tow bill at about $200. I've got the parts on order (fuel filter & pump) but I'm wondering, when installing the new pump, did you have to prime it? If so, how'd you go about it?

Thanks to everyone for all the great posts! This information is truly invaluable (unless you wanna put the $1400 stealership price tag on it).
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Old 12-10-2012, 02:44 PM   #540
jfoj
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No need to prime.

Cycle the key on and off 4 or 5 times.
__________________
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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