Why is my car dying out????

BuzzE46 · 11-29-2017, 07:33 PM

Quote:

Originally Posted by BoosTonian

Quote:

Originally Posted by applesauce683

Quote:

Originally Posted by BoosTonian

It's poor design. Bms moved the maf location ~10 inches upstream while positioning the evap before it. Now people in cold and/or higher elevations have issues.

Other intakes leave those two alone because of how sensitive those sensors are. No issues with other intakes. No need to clean the maf or oil the seating, reposition it, etc.

Just go back to stock and go with a different system.

I have the Max PSi intake, MAF and EVAP locations are at stock locations. Still have the issue.

Sorry to hear that.

So has anyone solved his issue, mine is been doing the same thing with the cold weather and it's only first cold start

BoosTonian · 11-30-2017, 08:43 PM

Quote:

Originally Posted by BuzzE46

Quote:

Originally Posted by BoosTonian

Quote:

Originally Posted by applesauce683

Quote:

Originally Posted by BoosTonian

It's poor design. Bms moved the maf location ~10 inches upstream while positioning the evap before it. Now people in cold and/or higher elevations have issues.

Other intakes leave those two alone because of how sensitive those sensors are. No issues with other intakes. No need to clean the maf or oil the seating, reposition it, etc.

Just go back to stock and go with a different system.

I have the Max PSi intake, MAF and EVAP locations are at stock locations. Still have the issue.

Sorry to hear that.

So has anyone solved his issue, mine is been doing the same thing with the cold weather and it's only first cold start

scaling issue with certain aftermarket intakes and the Maf. custom/flash tune might fix it.

no other reason behind it. people have reinstalled, oiled, done leak tests and nothing.

when I had injen intake I had no issues but I had vf flash. bms intake i had issues but had jb4.

Turbotalon92 · 11-30-2017, 09:06 PM

I’m with those that say there is an air leak under vacuum. Exactly the thing to cause idle surge.

4everkidd · 12-01-2017, 08:49 AM

Quote:

Originally Posted by BuzzE46

So has anyone solved his issue, mine is been doing the same thing with the cold weather and it's only first cold start

The problem as explained is the aftermarket intake in cold climates... two years now I have had to remove the intake in the winter after running all summer with no issue.

LOW4LYF · 12-01-2017, 09:08 AM

Quote:

Originally Posted by 4everkidd

The problem as explained is the aftermarket intake in cold climates... two years now I have had to remove the intake in the winter after running all summer with no issue.

No issues here in cold weather with aftermarket intake

applesauce683 · 12-01-2017, 10:14 AM

I have no idea if this is even possible but I think it might have something to do with the aluminum aftermarket intakes. I tried BMS and MaxPSi and both had cold weather problems. I switched to RKAutowerk carbon fiber and no issues. Seems like systems that utilize plastic or carbon fiber aren't having these problems.

4everkidd · 12-04-2017, 08:06 AM

Quote:

Originally Posted by Figurka

No issues here in cold weather with aftermarket intake

which intake are you running?

Quote:

Originally Posted by applesauce683

I have no idea if this is even possible but I think it might have something to do with the aluminum aftermarket intakes. I tried BMS and MaxPSi and both had cold weather problems. I switched to RKAutowerk carbon fiber and no issues. Seems like systems that utilize plastic or carbon fiber aren't having these problems.

My thoughts as well; something to do with the MAF sitting in an aluminum enclosure.

LOW4LYF · 12-04-2017, 10:09 AM

Quote:

Originally Posted by 4everkidd

which intake are you running?

rk autowerks

4everkidd · 12-04-2017, 11:46 AM

Quote:

Originally Posted by Figurka

rk autowerks

Carbon?

Another example that its the CAI material rather than design or MAF sensor placement

LOW4LYF · 12-04-2017, 12:48 PM

Quote:

Originally Posted by 4everkidd

Carbon?

Another example that its the CAI material rather than design or MAF sensor placement

Yes, Carbon... no issues with the east coast winters... second winter now.

Alpine_F82 · 04-12-2020, 06:53 PM

Quote:

Originally Posted by CaryTheLabelGuy

It's not the intake, it's the MAF sensors. When installing the MAF sensors in the new intakes, they are very tight. If you don't properly lube the rubber o-ring with oil before installation, the o-ring can get pinched and allow unmetered air to seep past them causing idle issues.

The other thing to do is to clean the MAF sensors with MAF cleaner while you have them out. If they get dirty, they can give false readings to the DME.

This is a common problem and is easily fixed.

I just installed my bms air intakes. I am having the same problem when I first start it jumpy idle and raises and lowers idle randomly, with the car shaking kinda like one of my coils are bad. I just replaced spark plugs 3k miles ago. Also sometimes on startup it acts like it wants to die, it got down to 400 rpm and started bogging. I’ve noticed if I try to push gas it probably would die. But after idling for a minute or two. It’s perfectly fine. Also between 1500-2000 on start up it seems to be really bad and shaky. So since then I have taken both air intakes out and took the maf sensors out and oiled around the o rings properly and reinstalled. Still doing the same thing. My maf doesn’t need cleaning either on the first startup of my air intake install it’s done this. It did look like the mafs o rings were pinching because the print was flipped around. But still didn’t help putting the lubrication on them. Is there anyway I can keep these intakes they sound and look good lol. The mafs are flush fit. Please let me know thanks

FAmotorsport · 09-24-2020, 09:22 PM

Quote:

Originally Posted by M4BimmerChris

I just installed my bms air intakes. I am having the same problem when I first start it jumpy idle and raises and lowers idle randomly, with the car shaking kinda like one of my coils are bad. I just replaced spark plugs 3k miles ago. Also sometimes on startup it acts like it wants to die, it got down to 400 rpm and started bogging. I’ve noticed if I try to push gas it probably would die. But after idling for a minute or two. It’s perfectly fine. Also between 1500-2000 on start up it seems to be really bad and shaky. So since then I have taken both air intakes out and took the maf sensors out and oiled around the o rings properly and reinstalled. Still doing the same thing. My maf doesn’t need cleaning either on the first startup of my air intake install it’s done this. It did look like the mafs o rings were pinching because the print was flipped around. But still didn’t help putting the lubrication on them. Is there anyway I can keep these intakes they sound and look good lol. The mafs are flush fit. Please let me know thanks

Were you able to figure out thr solution?

Alpine_F82 · 09-25-2020, 09:34 AM

Quote:

Originally Posted by FAmotorsport

Quote:

Originally Posted by M4BimmerChris

I just installed my bms air intakes. I am having the same problem when I first start it jumpy idle and raises and lowers idle randomly, with the car shaking kinda like one of my coils are bad. I just replaced spark plugs 3k miles ago. Also sometimes on startup it acts like it wants to die, it got down to 400 rpm and started bogging. I’ve noticed if I try to push gas it probably would die. But after idling for a minute or two. It’s perfectly fine. Also between 1500-2000 on start up it seems to be really bad and shaky. So since then I have taken both air intakes out and took the maf sensors out and oiled around the o rings properly and reinstalled. Still doing the same thing. My maf doesn’t need cleaning either on the first startup of my air intake install it’s done this. It did look like the mafs o rings were pinching because the print was flipped around. But still didn’t help putting the lubrication on them. Is there anyway I can keep these intakes they sound and look good lol. The mafs are flush fit. Please let me know thanks

Were you able to figure out thr solution?

Sold the intakes reverted back to stock. Apparently it works for some cars but not all. Idk what it is. I properly oiled them up right etc. I plan to go injen on my next car.

Likeanowl · 09-30-2020, 01:18 PM

So I’m now having this exact issue. Oddly enough I took my bms intakes off, went back to stock with new filters, and the problem still persists if not worse now. In doing so I made sure everything sat correctly and was tight. Also very carefully used MAF cleaner while I had the sensors out. Anybody have any other ideas? Really starting to stress me out.

Alpine_F82 · 10-06-2020, 09:10 AM

Quote:

Originally Posted by Likeanowl

So I’m now having this exact issue. Oddly enough I took my bms intakes off, went back to stock with new filters, and the problem still persists if not worse now. In doing so I made sure everything sat correctly and was tight. Also very carefully used MAF cleaner while I had the sensors out. Anybody have any other ideas? Really starting to stress me out.

I got a code after I reinstalled for maf to much air no engine light just in code reader. I cleaned mafs and have had no problem. The other thing is I have k&n air filters so the oil may have messed with the maf idk but I cleaned the k&n filters at the same time I did mafs, what do you have let me know.

Alpine_F82 · 10-06-2020, 09:12 AM

Quote:

Originally Posted by Likeanowl

So I’m now having this exact issue. Oddly enough I took my bms intakes off, went back to stock with new filters, and the problem still persists if not worse now. In doing so I made sure everything sat correctly and was tight. Also very carefully used MAF cleaner while I had the sensors out. Anybody have any other ideas? Really starting to stress me out.

Download BimmerCode and buy a Bluetooth adapter also it helps a ton

Likeanowl · 10-06-2020, 01:20 PM

Oddly enough I went back to stock downpipes and now the issue is gone. No idea how or why but it worked?

Alpine_F82 · 10-10-2020, 05:29 PM

Quote:

Originally Posted by Likeanowl

Oddly enough I went back to stock downpipes and now the issue is gone. No idea how or why but it worked?

Have no idea I have stock dp's lol

jaddie · 10-10-2020, 07:26 PM

mazaa93
Any update mate? I am also getting lumpy idle and the car stalling when doing short moves after just starting it.

CAT Heating disabled
BMS intakes

horsepower_and_hounds · 10-11-2020, 05:10 AM

CAT Heating disabled on mine caused stumbling so I left it on..... no issues going forward. But I still have the kittens running around under there

jaddie · 10-12-2020, 06:08 AM

Yeah I also have kittens under the bonnet still, however turning cat heating off shouldn't cause any issues with the engine running.

Cboy · 10-17-2020, 09:40 PM

What oil is everyone using to lube the O rings?

11-30-2017, 09:06 PM	#47
Turbotalon92 New Member 3 Rep 8 Posts Drives: On the hunt Join Date: Aug 2017 Location: Long Island, NY iTrader: (0)	I’m with those that say there is an air leak under vacuum. Exactly the thing to cause idle surge.
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12-01-2017, 10:14 AM	#50
applesauce683 First Lieutenant 270 Rep 352 Posts Drives: 2016 M3 Join Date: Oct 2014 Location: MD iTrader: (3)	I have no idea if this is even possible but I think it might have something to do with the aluminum aftermarket intakes. I tried BMS and MaxPSi and both had cold weather problems. I switched to RKAutowerk carbon fiber and no issues. Seems like systems that utilize plastic or carbon fiber aren't having these problems.
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09-30-2020, 01:18 PM	#58
Likeanowl Captain 1156 Rep 711 Posts Drives: BMW F80 M3/ Yas Marina Blue Join Date: Aug 2019 Location: Ohio iTrader: (0)	So I’m now having this exact issue. Oddly enough I took my bms intakes off, went back to stock with new filters, and the problem still persists if not worse now. In doing so I made sure everything sat correctly and was tight. Also very carefully used MAF cleaner while I had the sensors out. Anybody have any other ideas? Really starting to stress me out.
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10-06-2020, 01:20 PM	#61
Likeanowl Captain 1156 Rep 711 Posts Drives: BMW F80 M3/ Yas Marina Blue Join Date: Aug 2019 Location: Ohio iTrader: (0)	Oddly enough I went back to stock downpipes and now the issue is gone. No idea how or why but it worked?
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10-10-2020, 07:26 PM	#63
jaddie Private First Class 30 Rep 115 Posts Drives: San Marino Blue M4 Comp Join Date: Apr 2015 Location: East Sussex iTrader: (0)	mazaa93 Any update mate? I am also getting lumpy idle and the car stalling when doing short moves after just starting it. CAT Heating disabled BMS intakes __________________ Current: F82 M4 Comp '19 Previous: F36 440i M Sport '18 Previous: F32 430d xDrive M Sport '15 Previous: F30 320d M Sport '14 & E81 118d M Sport '09
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10-11-2020, 05:10 AM	#64
horsepower_and_hounds Brigadier General 1836 Rep 4,203 Posts Drives: BMW Join Date: Aug 2012 Location: USA iTrader: (9)	CAT Heating disabled on mine caused stumbling so I left it on..... no issues going forward. But I still have the kittens running around under there
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10-12-2020, 06:08 AM	#65
jaddie Private First Class 30 Rep 115 Posts Drives: San Marino Blue M4 Comp Join Date: Apr 2015 Location: East Sussex iTrader: (0)	Yeah I also have kittens under the bonnet still, however turning cat heating off shouldn't cause any issues with the engine running. __________________ Current: F82 M4 Comp '19 Previous: F36 440i M Sport '18 Previous: F32 430d xDrive M Sport '15 Previous: F30 320d M Sport '14 & E81 118d M Sport '09
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10-17-2020, 09:40 PM	#66
Cboy Private First Class 39 Rep 178 Posts Drives: 2019 AW F87 ZCP Join Date: Sep 2018 Location: Hawaii iTrader: (0)	What oil is everyone using to lube the O rings?
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