[Taskmaster]

[QUOTE=justpete;21336214]

Originally Posted by TheAxiom

Sounds like they didn't bleed the clutch cylinder.

Rather that than another clutch job...

[Taskmaster]

I think this clutch is going.
And the only thing I haven't replaced is a fuel pump. Ugh.

[Terraphantm]

Originally Posted by justpete

Sounds like they didn't bleed the clutch cylinder.

Wouldn't that result in a clutch that doesn't fully disengage rather than the other way around?

[E90joee]

2f7b oil pressure switch plausibility
29e0 fuel oil mixture control
29e1 fuel mixture control 2
2d06 air masss system
2d29 differential pressure sensor, suction pipe plausibility
29dc cyl injection switch off

these are the codes ive pulled from my car when I first had this problem...all symptoms like you guys slight hesistation surging and even car dies atleast once or twice a month..i just pull over shut off the car and start it back up again and its good to go sometimes even runs better its been like this since about November (I installed headers and 3IM with AA tune) that's when all the problems started happening as of today still running like that but it was bareable now my car sounds like a montercarlo (not in a good way lol sounds more rumbly and went in limp mode today) very sluggish will be tackling maf and throttle body tomorrow and after that maybe coils and plugs as I already have plugs. will update tomorrow.

[Taskmaster]

Fuel pump?

[DaanBMW]

Originally Posted by TheAxiom

Let me know what you find.

What else could it be - throttle positioning sensor? Fuel pump? Vacuum leak? O2 sensors?

Well, I've listed this on who-knows what threads 'round here trying to learn of a fix: so far I've replaced solenoids, MAF, VVT motor, camshaft positioning sensors (both), check valves. None fixed it. No codes, at least not active. Currently torn between a DME update (or reset to factory defaults) and other wild geese like fuel pump, o2 sensors, throttle sensor or asm, etc.

NONE of which I would have an issue replacing (love the car) but doing all for no reason is not attractive...

[PhaseP]

Originally Posted by E90joee

2f7b oil pressure switch plausibility
29e0 fuel oil mixture control
29e1 fuel mixture control 2
2d06 air masss system
2d29 differential pressure sensor, suction pipe plausibility
29dc cyl injection switch off

these are the codes ive pulled from my car when I first had this problem...all symptoms like you guys slight hesistation surging and even car dies atleast once or twice a month..i just pull over shut off the car and start it back up again and its good to go sometimes even runs better its been like this since about November (I installed headers and 3IM with AA tune) that's when all the problems started happening as of today still running like that but it was bareable now my car sounds like a montercarlo (not in a good way lol sounds more rumbly and went in limp mode today) very sluggish will be tackling maf and throttle body tomorrow and after that maybe coils and plugs as I already have plugs. will update tomorrow.

Did you get the ECU out from its place for the tune flashing?

[TurnersInOz]

2006 330i 219000KM

Reading through this thread it sounds like at least some of you have the same issue I am chasing. Here's my description:
When starting the car cold, the engine stumbles for perhaps a second, maybe two then smooths out. If I put it in gear when this is happening it surges, sometimes pretty hard.

With the car in park and idling fine if I mash the throttle to the floor it will also stumble. Most of the time it recovers and revs at which point I of course release the throttle, other times it may actually die.

Today when I went to start it after work, it took four tries to get it to stay running, and this is the worst it has been.

Since this car is new to me I am going through it and doing maintenance so I know where things stand.
As part of this and to address this issue I've replaced the MAF after cleaning the original did not help. There have not been any codes, but I will check it again since I need to reset the oil change interval anyway.

I will be happy to replace the coils if there is good indication this will help. I suspect they are pretty old, since I have not been able to disconnect the electrical connector for a few of them (I tried quickly, didn't put much effort into it... They didn't easily come off though).

After this I'll pull the DISA's and inspect and from there the throttle body.

[E90joee]

Originally Posted by PhaseP

Did you get the ECU out from its place for the tune flashing?

No i did it myself with simon 3

[PhaseP]

Originally Posted by E90joee

No i did it myself with simon 3

Reason I asked you could be having electrical connection issues. Most of the codes you posted indicate lean air fuel. You may have a vacuum leak around manifold. But why you got the injector error? The MAF code indicates electrical also in my experience, but mine is 06 car so uses analog output, later years are digital output mafs. Lean may be because of fuel pump or regulator too, but then why Maf error?

[PhaseP]

Originally Posted by TurnersInOz

2006 330i 219000KM

Reading through this thread it sounds like at least some of you have the same issue I am chasing. Here's my description:
When starting the car cold, the engine stumbles for perhaps a second, maybe two then smooths out. If I put it in gear when this is happening it surges, sometimes pretty hard.

With the car in park and idling fine if I mash the throttle to the floor it will also stumble. Most of the time it recovers and revs at which point I of course release the throttle, other times it may actually die.

Today when I went to start it after work, it took four tries to get it to stay running, and this is the worst it has been.

Since this car is new to me I am going through it and doing maintenance so I know where things stand.
As part of this and to address this issue I've replaced the MAF after cleaning the original did not help. There have not been any codes, but I will check it again since I need to reset the oil change interval anyway.

I will be happy to replace the coils if there is good indication this will help. I suspect they are pretty old, since I have not been able to disconnect the electrical connector for a few of them (I tried quickly, didn't put much effort into it... They didn't easily come off though).

After this I'll pull the DISA's and inspect and from there the throttle body.

You may have fuel delivery problem pump or regulator. Fuel pressure measurement on the fuel rail may shed some light.

[Taskmaster]

Well, car went into a limp/ studder mode on my way to work. Bank 1 and 2 o2 sensor codes, mixture codes and manifold pressure sensor code, plus 1 unknown...

Thoughts?

[E90joee]

Originally Posted by DaanBMW

Ok, thanks ! everything sounds like what I am experiencing. You got it throw a CEL/code by just keeping at it ? Did you replace all packs or just 1 (?) that caused it ?

Check my thread with the cc id problem i have a vide up there on how it stutters just like you desrcibe it and after i checked the codes today i have about 3 misfires so ill start there

[E90joee]

Originally Posted by TheAxiom

Well, car went into a limp/ studder mode on my way to work. Bank 1 and 2 o2 sensor codes, mixture codes and manifold pressure sensor code, plus 1 unknown...

Thoughts?

Same this is what im getting man

[Taskmaster]

Originally Posted by E90joee

Same this is what im getting man

I'm getting about half of those. This is insane.

[PhaseP]

Originally Posted by E90joee

Same this is what im getting man

Now you have inlet air temperature sensor signal error. That is just a dummy thermistor element. You either have electrical connection problems somewhere or maybe the tune.

[Taskmaster]

Originally Posted by PhaseP

Now you have inlet air temperature sensor signal error. That is just a dummy thermistor element. You either have electrical connection problems somewhere or maybe the tune.

My sensor is brand new- same with the valvecover, etc.

Intake manifold pressor sensor error
Mixture error
O2 sensor errors

[PhaseP]

Originally Posted by TheAxiom

My sensor is brand new- same with the valvecover, etc.

"Electrical connection problem" not sensor.
We take the connections to be working as granted but they don't always.
All those sensors giving error at the same time could be because of a large connector at a junction box not being seated well or got dirty pins or similar resulting in intermittent issues.
I had my share with the MAF connector but I had rich and Maf error.
The above post has errors on oil pressure switch, map, Maf and ITA sensor.
I wonder if their wires all go to the junction box under intake manifold.

[Taskmaster]

Originally Posted by BimmerGeeks

Did rheingold not get you anywhere?

Honestly fan I fell alseep both times sorting it out, tonight is my night though!

[Taskmaster]

Originally Posted by BimmerGeeks

Cool. Let me know if you need anything.

Thank you, I mean that.

[E90joee]

Originally Posted by TheAxiom

Thank you, I mean that.

About to part out and sell at this point

[TurnersInOz]

Originally Posted by PhaseP

You may have fuel delivery problem pump or regulator. Fuel pressure measurement on the fuel rail may shed some light.

Thank you PhaseP, I'll see about getting that measured.