[CONTROL ONE]

Originally Posted by Mike@N54Tuning.com

The intake moves a lot more air and the MAF sensor is very sensitive to airflow at low idle speeds. There is a post in the n54tech support section showing how to place spacers in the MAF to adjust it for those few cars who have this issue.

Mike

Could you post the link please? I'd be willing to try if it is simple enough.

[ocN55]

I got it on video this time... This was a cold start

[skitsos]

Originally Posted by ocN55

I got it on video this time...

Damn... And to think I was about to buy the BMS Intake. In Iowa we have decently hot summers with humidity and VERY blistering cold winters. I guess the BMS Intake is out for me. Might have to look into some new options. Anybody got a good intake recommendation??

[Buckeyes]

I have the AFE open intake, zero issues or Cel's.

[ocN55]

Originally Posted by M_Proper

Interesting thread. I just started my car an hour ago cold and it had a rough idle. It went away after giving slight throttle in reverse leaving the garage. I only have the BMS intake and JB4 installed...but won't diagnose until further symptoms emerge. Always could be operator install error.

So far am enjoying the extra power on map 5 and wife says car runs like stock.

Will report back if symptoms persist.

are you 6mt or 8at?

[Mike@N54Tuning.com]

Originally Posted by CONTROL ONE

Could you post the link please? I'd be willing to try if it is simple enough.

I don't have a link to it. Best to ask on BMS' support forum for that as I don't think they like me linking other forums here.

The video posted doesn't seem that bad to me. Almost normal for a cold start at least in my experience. It raises the cold idle RPMs higher than warm idle as part of the cat warmup process.

Mike

[ocN55]

Originally Posted by Mike@N54Tuning.com

The intake moves a lot more air and the MAF sensor is very sensitive to airflow at low idle speeds. There is a post in the n54tech support section showing how to place spacers in the MAF to adjust it for those few cars who have this issue.

Mike

Originally Posted by CONTROL ONE

Could you post the link please? I'd be willing to try if it is simple enough.

This is what BMS sent me, 3 options that may help: one 1/4in nut on one screw, one on the other, or one on both.
I'll have to give it a try and do some trail and error, see what works.

[casper83]

Took the BMS intake off last night and went back to the stock one. The hesitation (not turbo lag, but the hesitating from applying the throttle to the car actually responding) seems greatly reduced. This morning on cold start up the engine surging was non-existent as was the random surging at steady throttle. I haven't had a lot of seat time yet, but so far so good. The car is fun to drive again.

[CONTROL ONE]

Originally Posted by Ramathorn

Your images aren't showing up. It looks like you tried to link them out of the message you got in gmail.

x2, please host the pictures or email them to me that would be great. Thanks!

[ocN55]

Originally Posted by Ramathorn

Your images aren't showing up. It looks like you tried to link them out of the message you got in gmail.

Originally Posted by CONTROL ONE

x2, please host the pictures or email them to me that would be great. Thanks!

Fixing them now...

Update: how about now?

[StephanieDiane]

Originally Posted by SuperBran

The bms intake did it for me as well. Not only that the bog down and lurch back up to normal would happen when slowing down and coming to a stop which really bothered me. My intake also caused a CEL. I removed the intake and it also stopped happening for me. Kept my jb4 since i have er catless dp as well and those have been fine. Damn do i miss that swoosh! Anyone have any correction methods for this intake problem? Do we think the afe intake would result in the same issues?

I don't mean to thread jack, but I've been curious if what my car has been doing is normal (I admit complete ignorance of engines), and what you described sounds very similar to my issue. However, I'm completely stock. After start, for the first few minutes of driving, especially slowly, if I take my foot off the gas or slow down, the car stutters and lurches. It literally feels like it has just died. The decrease in speed and power jerks me in my seat. I would compare it to looking like someone badly driving a manual transmission. When I again accelerate it has a lag. First BMW. Is this normal? Sorry for jumping on - thought you guys might know.

[Ramathorn]

Originally Posted by ocN55

Fixing them now...

Update: how about now?

They are showing up now! Thanks!

Keep us posted on which combo of spacing works best

[CONTROL ONE]

Would air, dirt, water not be able to get into the intake tube that way?

[Autobot]

Yeah allowing that extra space does not seem like a great idea.

[skitsos]

Ya... That doesn't really seem like a great solution. Could start more problems down the road. I don't know, I might have to hold off on buying a BMS Intake right now and look at my options. BMS needs to figure this out because it seems to be a design flaw with how close the MAF is, they need to have a better solution than just putting nuts under the screws for space. Hopefully they can solve this the right way instead of just taking short cuts...

[ocN55]

If the problem keeps happening or gets worse, I'll try doing this. It hasn't happened again. I trust Terry so I don't mind trying out his suggestion.What this simply does is change the MAF orientation relative to incoming airflow. This will have some effect on how it reads air flow at idle

[MrBucket]

I have the BMS intake (had it on since August) and I've never had the car run strangely for me with it.

[chaddy74]

This is a joke not a solution !! People pay money for a product then this is the solution !! Shows allot about the company you are dealing with !! How can you release a product to market and have this as a solution .... good thing its cheap and nasty ! I bet Gen 2 will not have these issues ... like most things from burger they release products to the market then have the public refine there R&D at no expense to them. Interesting concept.

Originally Posted by ocN55

Fixing them now...

Update: how about now?

[Mike@N54Tuning.com]

Originally Posted by chaddy74

This is a joke not a solution !! People pay money for a product then this is the solution !! Shows allot about the company you are dealing with !! How can you release a product to market and have this as a solution .... good thing its cheap and nasty ! I bet Gen 2 will not have these issues ... like most things from burger they release products to the market then have the public refine there R&D at no expense to them. Interesting concept.

The spacers are a troubleshooting step to determine if the MAF placement is causing the idle issue in the specific vehicle, not to provide a permanent fix. If one of the placement location resolves the situation BMS will make you a tube with that orientation.

Mike

[chaddy74]

So they should !! and refund you the money for having to trouble shoot your own issue in the first place !! The intake is the issue its a flawed design and my point is it should not be on the market .

Originally Posted by Mike@N54Tuning.com

The spacers are a troubleshooting step to determine if the MAF placement is causing the idle issue in the specific vehicle, not to provide a permanent fix. If one of the placement location resolves the situation BMS will make you a tube with that orientation.

Mike

[skitsos]

Originally Posted by chaddy74

So they should !! and refund you the money for having to trouble shoot your own issue in the first place !! The intake is the issue its a flawed design and my point is it should not be on the market .

Agreed...

[Mike@N54Tuning.com]

Originally Posted by chaddy74

So they should !! and refund you the money for having to trouble shoot your own issue in the first place !! The intake is the issue its a flawed design and my point is it should not be on the market .

If you are having an issue with your BMS intake contact them, and I'm sure they would be happy to have you return it. The fact is 90% of the cars I know running this F30 intake run flawlessly. Those few who don't can A) return it for a full refund or B) work with BMS to troubleshoot their issue so it can work as flawlessly for them as it does for everyone else.

Mike