Difference in mass air sensors?

Solo_M_Tech · 01-02-2014, 11:14 AM

I installed the euro airbox on my US spec 128i. It came with the stock 130i mass air sensor. When I installed it I used the mass air sensor from the US spec air box because it's brand new, as is the car. Ever since I did, the car stumbles alittle around 3000 rpms in first and second under full throttle. The us spec mass air sensor has a different part number and is a different brand. Does it matter? Could having the wrong mass air sensor for the euro box make my car run worse? Btw it has a brand new filter. And I've ran 2 tanks of gas through it.

631twentyeighteye · 01-02-2014, 11:22 AM

I haven't heard of this before, but id think it's worth swapping the sensors to see if it runs any better, Shouldn't take much time or effort. It could also be as simple as needing more time to adjust itself.

Solo_M_Tech · 01-02-2014, 11:32 AM

That could be the issue. I've read in the e90 threads that the euro mass air sensor won't work with the us spec ecu. Both sensors look the same but maybe calibrated different. Though I could have gotten bad gas. I buy my gas on post (military) and they have been known to get bad gas every once in a while.

pj.rodriguez · 01-02-2014, 11:38 AM

I also just installed euro box. Everywhere it says to use the US MAF and not the Euro one. I've had no issues thus far. Just put it on though so I have no idea if it will happen to me.

TheSt|G · 01-02-2014, 12:55 PM

Use the US spec, the Euro spec unit runs completely differently. If it is stumbling, check the connections.

Solo_M_Tech · 01-02-2014, 01:05 PM

^ will do.

andrey_gta · 01-02-2014, 03:49 PM

Clean the Maf maybe, if nothing helps.

631twentyeighteye · 01-02-2014, 04:21 PM

I thought the MAF's in our cars shouldn't be touched? I mean unless you're already planning on changing it, then i suppose cleaning it would be worth a shot.

Solo_M_Tech · 01-03-2014, 06:49 AM

I think it's bad gas. It got a lot worse after a full up. It wasn't as bad today. I did the throttle reset ( don't think it did anything) and checked all of my connections. Gonna run some fuel treatment through it and see if that helps. Maybe I'm just getting use to how it drives and I'm noticing little flat spots in the torque curve. Who knows. I just wanted to check with the community.

TheSt|G · 01-03-2014, 08:09 AM

Quote:

Originally Posted by 631twentyeighteye

I thought the MAF's in our cars shouldn't be touched? I mean unless you're already planning on changing it, then i suppose cleaning it would be worth a shot.

Yeah, don't clean the MAF.

Solo_M_Tech · 01-03-2014, 09:51 AM

It was bad gas. Put some gumout fuel system cleaner in it and all is well. Pulls like a champ!

01-02-2014, 11:14 AM	#1
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	Difference in mass air sensors? I installed the euro airbox on my US spec 128i. It came with the stock 130i mass air sensor. When I installed it I used the mass air sensor from the US spec air box because it's brand new, as is the car. Ever since I did, the car stumbles alittle around 3000 rpms in first and second under full throttle. The us spec mass air sensor has a different part number and is a different brand. Does it matter? Could having the wrong mass air sensor for the euro box make my car run worse? Btw it has a brand new filter. And I've ran 2 tanks of gas through it. __________________ 2014 M5 6MT
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01-02-2014, 11:22 AM	#2
631twentyeighteye Colonel 198 Rep 2,239 Posts Drives: 08 335i Join Date: Aug 2012 Location: Long island iTrader: (7)	I haven't heard of this before, but id think it's worth swapping the sensors to see if it runs any better, Shouldn't take much time or effort. It could also be as simple as needing more time to adjust itself. __________________ 08 e93 335i MT
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01-02-2014, 11:32 AM	#3
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	That could be the issue. I've read in the e90 threads that the euro mass air sensor won't work with the us spec ecu. Both sensors look the same but maybe calibrated different. Though I could have gotten bad gas. I buy my gas on post (military) and they have been known to get bad gas every once in a while. __________________ 2014 M5 6MT
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01-02-2014, 11:38 AM	#4
pj.rodriguez Lieutenant Colonel 84 Rep 1,623 Posts Drives: Alpine White 128i Cabrio Join Date: Jun 2013 Location: Toronto, Ontario, Canada iTrader: (9) Garage List 2008 BMW 128i E88 [9.00]	I also just installed euro box. Everywhere it says to use the US MAF and not the Euro one. I've had no issues thus far. Just put it on though so I have no idea if it will happen to me. __________________ 2008 128i E88 / Alpine White / Boston Leather Sport / 6AT / M3 Paddle Shifters / Bilstein B8 / H&R Springs / Dinan Fixed Camber Plates / BMW 335i Front Brakes / PIAA Xtreme White 4150K Angel Eyes / Rear Fogs Enabled / Cyba Air Scoops / Euro Airbox / BMW Performance Exhaust / Stubby BMW Antenna
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01-02-2014, 12:55 PM	#5
TheSt\|G Resident Tamed Racing Driver 298 Rep 4,697 Posts Drives: 911, 130is, E39 M5, E36 M3 Join Date: Mar 2008 Location: Outside Philly iTrader: (2)	Use the US spec, the Euro spec unit runs completely differently. If it is stumbling, check the connections.
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01-02-2014, 01:05 PM	#6
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	^ will do. __________________ 2014 M5 6MT
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01-02-2014, 03:49 PM	#7
andrey_gta Brigadier General 298 Rep 4,040 Posts Drives: 130i coupé ;) Join Date: Nov 2011 Location: Bimmerpost iTrader: (1) Garage List 2008 BMW 128i [10.00]	Clean the Maf maybe, if nothing helps. __________________ 128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
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01-02-2014, 04:21 PM	#8
631twentyeighteye Colonel 198 Rep 2,239 Posts Drives: 08 335i Join Date: Aug 2012 Location: Long island iTrader: (7)	I thought the MAF's in our cars shouldn't be touched? I mean unless you're already planning on changing it, then i suppose cleaning it would be worth a shot. __________________ 08 e93 335i MT
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01-03-2014, 06:49 AM	#9
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	I think it's bad gas. It got a lot worse after a full up. It wasn't as bad today. I did the throttle reset ( don't think it did anything) and checked all of my connections. Gonna run some fuel treatment through it and see if that helps. Maybe I'm just getting use to how it drives and I'm noticing little flat spots in the torque curve. Who knows. I just wanted to check with the community. __________________ 2014 M5 6MT
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01-03-2014, 09:51 AM	#11
Solo_M_Tech Brigadier General 1688 Rep 3,140 Posts Drives: 2014 M5 6MT Join Date: Nov 2013 Location: Massachusetts iTrader: (7) Garage List 2014 BMW M5 [0.00]	It was bad gas. Put some gumout fuel system cleaner in it and all is well. Pulls like a champ! __________________ 2014 M5 6MT
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