Vanos didn't solve it?

[cparker]

Well, I have a list of parts I need to order so tuesday I'm going to call the dealership and set up an appointment for a DME update and order the parts.

I just pulled my airbox and checked the lower intake boot for cracks and surprisingly there are none that I could see. I didn't completely remove it because I'm going to pull my ICV tomorrow to clean it and I don't feel like doing that all twice, I'll look at it closer then.

[kpro]

Cparker:
I have the EXACT same problem. I've put 1500 miles on my cars since vanos rebuild and still have the 2500-3000rpm hesitation. I did notice improvement in torque and take off after the vanos was complete, but the hesitation is just as bad as it was, no improvement there. I checked my DISA and its fine. I also had the DME reflash done and I'm at a complete loss as to whats wrong now.

This weekend autozone hooked up the OBD2 scanner just to see if I had soft codes stored, and there was nothing. I was kinda hoping a cam sensor was crapping out or something, just so that I would have an answer. I'm going to subscribe to this thread incase you figure it out and I'm over here still trying to find a solution.

[aurelius]

Cparker:
I have the EXACT same problem. I also had the DME reflash done and I'm at a complete loss as to whats wrong now.

You may want to research exactly which version to which you were "updated." See post #70 here:

http://www.bimmerfest.com/forums/sho...=120971&page=3

[cparker]

I have to be honest, I was expecting better engineering when I purchased a BMW. There are several serious issues with these cars.

[aurelius]

I have to be honest, I was expecting better engineering when I purchased a BMW. There are several serious issues with these cars.

You'll find quirks with any make or model. Whether it's a Toyota with floor mats jammed up under the pedals, a Range Rover whose inevitable air suspension failure sounds like a bomb exploding, or a new $300k Ferrari displaying spontaneous combustion. And on new cars, the quirks haven't been sorted out yet, which results in multiple dealership visits for unresolved warranty work. It's really a matter of picking your poison.

[Hornung418]

Found it! The reason behind the stumble at 2.8k is an o2 sensor reading error.

http://forums.bimmerforums.com/forum...97&postcount=6

So if you've updated your DME...I suggest changing your Pre-cat o2 sensors.

[kpro]

Thank you Horney! I will run down an 02 here in a few days and see if that takes care of it. I kinda forgot about the bimmerforums since I've came over here. I search google when I need answers, I'm dumb sometimes.

[billschusteriv]

Not dumb at all Kristen. I try to forget that other forum I frequented.

That's why we've got the Family Search enabled... and an understanding community that doesn't mind or feel threatened by links to other boards when the data exists elsewhere....

[kayger12]

o2 sensor is a great call. Nice research, Justin.

[Kudos]

Please let us know if this solves the issue. Just curious, since i haven't checked, are there 2 precat and 2 post cat just like the m52 engine?