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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > 08 328xi after market intake now stalling.



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      06-07-2016, 08:08 PM   #1
NJ328xi
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08 328xi after market intake now stalling.

So I bought an after market intake off of eBay purely for the sound. I know I'm not going to make any power from it. Well I installed it today and took it for a test drive and it sounds great..... BUT about 3 miles into my ride it stalled at the light. It started right back up and about a mile later it did it again while costing to the light. Popped it in gear and started right up. I made it home and was coasting down my street and it didn't stall and sat in my driveway for about 5 mins with out it stalling. On the instructions it said to take a hose off the throttle body and put it on the intake. I couldn't find that anywhere. Would that make my car stall? Also I came with a plug for the intake so I put it on said spot. Any help would be greatly appreciated. Thank you.



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      06-07-2016, 08:09 PM   #2
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Also there was no check engine light on
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      06-07-2016, 09:48 PM   #3
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Where is your MAF sensor?
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      06-07-2016, 10:05 PM   #4
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Quote:
Originally Posted by Tom Droze View Post
Where is your MAF sensor?
I'm wondering the same thing
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      06-07-2016, 10:37 PM   #5
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I assume it goes into that square bit on the left side.
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      06-07-2016, 10:44 PM   #6
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rofl
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      06-07-2016, 11:29 PM   #7
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Quote:
Originally Posted by hassmaschine View Post
rofl
Wait, you don't normally laugh, much less doing it while rolling on the floor; was it something I said?
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      06-08-2016, 12:57 AM   #8
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MAF sensor isn't plugged in.
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      06-08-2016, 01:48 AM   #9
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Hot air intake, forgets to install MAF.... Wonder why it doesn't run right?

Sorry op - not trying to be harsh. I honestly laughed when i saw the picture and Tom's reply. :-P
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      06-08-2016, 10:04 AM   #10
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Wow people are dicks on here.
The MAF is on there.

And there's a heat shield. It's just not on in the pic.
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      06-08-2016, 10:53 AM   #11
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Quote:
Originally Posted by hassmaschine View Post
Hot air intake, forgets to install MAF.... Wonder why it doesn't run right?

Sorry op - not trying to be harsh. I honestly laughed when i saw the picture and Tom's reply. :-P
MAF is hooked up.
Guess I'm talking with mr perfect here
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      06-08-2016, 11:04 AM   #12
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Take the hot air intake off and replace it with your sock COLD air intake (remove the charcoal filter before you put it back on).. Then test and see if you car still stalls.
Also if you are still going to play around with the ebay intake then make sure MAF is on their secured all the way, it cannot stick out even a little bit. BTW that "heat shield" does very little to keep the hot air away from the intake.
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      06-08-2016, 11:38 AM   #13
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Quote:
Originally Posted by NJ328xi View Post
Wow people are dicks on here.
Every forum has one or two.
Quote:
The MAF is on there.
Sorry man but I don't think you installed it. I don't see an obvious black plastic part attached to the mounting boss like in this pic. If you look at the side of the intake facing the engine is there a hole present? If so you need to remove the sensor from the factory air box and install it onto the new intake. Some MAF sensors have an arrow indicating airflow into the engine so if it has one make sure the arrow points towards the throttle body.

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      06-12-2016, 09:32 AM   #14
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Quote:
Originally Posted by Delta0311
BTW that "heat shield" does very little to keep the hot air away from the intake.
Don't worry OP, my injen intake has the same design and works perfectly! Sounds amazing too!

Some may say you'll lose a few HP due to some warm air still coming in, but I haven't noticed a difference in performance. You could always get hood scoops to help force a bit more outside air into that area too (though even that effectiveness is questioned).

Good luck! Your issues are likely due to improper MAF placement. Try cleaning it while you're at it too.
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      06-13-2016, 04:22 AM   #15
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OP, yes it will suck in all the hot air for 0-10kmh, but let say while the car is rolling at a constant speed, it will suck in more warm/cold air, which is not a bad thing, you may consider putting a shield between the engine and the intake
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      06-13-2016, 04:59 PM   #16
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Those are the open hot air intakes,I would just install a 90 degree bend thru the hood like the diesel guys,then I attach another for the cold air, just playing cause I saw those to and ya,the factory box modified yields the better performance.
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      06-13-2016, 05:48 PM   #17
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While I agree that intake is doing nothing other than making noise, it's mostly likely stalling because there is too much airflow versus what the DME was used to seeing.

Try keeping holding the motor at 2000-3000rpms for a few minutes, then take a drive and see if the issue persist. If you have a scan tool, resetting the adaptations may help.
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      06-13-2016, 06:07 PM   #18
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unless you have a massive vacuum leak, there's no way that can happen. the DME directly controls how much air enters the engine via the valvetronic mechanism. The MAF also gives an accurate measurement. if there is more air, there is more fuel because the DME is programmed that way. It is not so dumb that an extra 2% more air (likely less, in reality, due to hot air intake design) would cause it to run lean.
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      06-13-2016, 06:17 PM   #19
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lol
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      06-13-2016, 08:56 PM   #20
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So why does an N54 run so crappy after a walnut shell blasting? It's very common for rough idle after a cleaning, especially if the build up was bad.

After resetting adaptations, the motor returns to normal idle.

I understand an intake should not increase airflow a significant amount, but if the filter was clogged or there was some other issue with the car that the dme had to adjust accordingly, it won't just clear up right away.
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      06-16-2016, 07:45 AM   #21
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      06-16-2016, 12:45 PM   #22
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It looks like it was a restriction,do the reset,but it still shouldn't matter,unless something is unplugged,cars will adjust fuel,air timing all depending on what's being drawn into the motor,the more air,the more fuel,it should compensate itself,the ecu makes adjustments continually,
Look at it this way,do you breath better thru the mouth or the nose? Now,what if both were closed shut?,how long can your heart beat with no oxy? Same princeable,it learns to adapt. If you do keep that,fab a shield or plumb it out the engine bay.
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