E53 4.4l Missing Problem
 

Hey guys have done some searching, but can't find the answer. I have just picked up another 04 model e53 with only 80k's on the clock.
It has a good service record, but is misfiring on start up and at lower revs. I have ordered some plugs, but just seeing if anyone else has had any other experience.
Cheers
Ben

Plugs and coils seem to be a good place to start! coils if the problem still persists! (any OBD2 codes?? )
previous owner using premium fuel as well??

It has an N62...

Misfires on start up can be caused my an intermediate lever problem in the valvetronic system. Very expensive repair.

I have this problem with mine. Usually (if it's not too cold outside) a simple restart of the engine will solve the problem. When it's extremely cold outside I have to keep the RPM's around 2k for 60 seconds or so after starting and it prevents the misfire.

Also, the crankcase vent valves being faulty can cause this. They are a very cheap fix. 15 bucks or so a piece (there are 2, one in each valve cover) from ECS.

Here is all the info regarding the valvetronic issue.

BMW valvetronic technology

Welcome back for more punishment and beatings...lol!

Give it a service, plugs, leads, coils, filters, oil and reset the ecu.

Yeah, i'll do all of the above. But I do remember my old one doing the same thing on start up and the crank case vent valves were the fix, so thanks for the reminder.

Now, when you say reset the ecu danielsan, what do you do for this?

great article. I thought this was my issue, but my mech says now way in hell.
I copied it to a work document to be safe.
as for the Crankcase Vent Valves, I'm just gonna replace mine for shits and giggles (seeing as how ECS tuning sells them for so cheap) and i have a feeling it may smooth my rough idle out I've not gotten ove ra cold winter. I'm sure the cold cold -34° C (-29° F) has made the rubber disc plasticky and has caused it to break finally.
Oh well, look slike a VERRRRRY easy fix :)

Disconnect the battery. Doing so will get the ecu to relearn variable values like fuel trim and spark advance. I would only bother with doing this if the service doesn't help.

I replaced the CCV's on mine last night. took a total of 20 minutes and I Noticed an instant smoothing of the idle. No more white smoke when taking off from a stop.

The real test will be when I start her this morning after sitting all night. Hoping this solves my cold start misfire problem.

Also for you V8 guys, throwing in a bottle or two of these might help, considering the cold winter we've had:

http://i.walmartimages.com/i/p/00/07...06_500X500.jpg

Naz24 had a problem last winter with misfires and such, he thought it was intermediate levers, he threw a bottle of this in a fresh tank and it helped him out tremendously. Make sure there is no moisture in the fuel system!

CCV replacement didn't solve my cold start problem. I still got a flashing SES light after about 10 seconds of idling when cold. Shut it off, restarted and it went away. I guess it got a little better as it actually went away with one restart instead of a restart and holding the RPM's up for 2 minutes.

I'll give the "heat" thing a try to see if that helps.

I would throw 1-2 bottles in with a full fresh tank of 93, make sure its the Red Iso-Heet. Let me know if it helps. $7 for a 4 pack at Wal Mart

Off to Wal-Mart I go.

I'm at a 1/4 tank now so it would probably be the perfect time to put some in before filling up.

Yes it would. I await positive results :)

I just went to ten different stores, wal-mart, pep boys, autozone, advanced auto, target and a few other places. Every bottle of HEET was sold out. God damn this Polar Vortex.

I guess positive results will have to wait.

Happened to me the other day in wal mart as well, even the normal yellow bottle sold out.

Sorry to hear that man but I'm feeling good that most likely the red heet will help you! Winter is rough on vehicles and especially ours

I'll keep checking, the manager at Pep Boys told me they can't even order it.

Insane. It's probably sold out due to all the people that have had their gas lines freeze after parking their car overnight in sub-zero temps with an empty gas tank.