Why is my car dying out????

[CaryTheLabelGuy]

Originally Posted by 4everkidd

Thanks for the heads up! I'm going to check and verify the following but I did properly lube and seat the MAF's during install.

I am only at 6000mi so I doubt dirty MAF's are the issue; that being said I did have oiled BMC filters installed prior to the SSR intakes.

I may try a cold start with the MAF sensors unplugged tonight.

Oiled filters can certainly cause MAF issues, especially if over-oiled.

[dzvero]

Solution is move to Texas

[BoosTonian]

Ran into the same issue with the bms intakes. Switched to other intake systems and didn't experience it again.

When I had emailed bms they said it might happen in colder climates and was normal. So why bother making an intake that only works in certain places?

[4everkidd]

Originally Posted by CaryTheLabelGuy

Oiled filters can certainly cause MAF issues, especially if over-oiled.

Update: Took a video of the cold start with MAF sensors plugged in.

Unplugged the sensors this morning and started it back up... no issue's

Looks like I'm pulling the intake and looking for leaks this weekend.

[applesauce683]

I have this problem to. Has happened with my previous setup of BMS and with my current Maximum PSi. Definitely gets worse as the weather is getting colder. I have taken out both MAF sensors and cleaned them and lubed the o-ring, still happens.

Is it possible it might be caused by the aluminum intake tubes as opposed to the stock plastic? Do people with carbon fiber intakes have this problem?

[Kankles]

I don't think the juice is worth the squeeze on aftermarket intakes w this car. I installed KN filters, removed charcoals and called it a day. No problems

[BimmerFix]

Originally Posted by 4everkidd

add one more to the mix here, also another Calgary candidate.

Car starts, roughly idles with big pick ups and drops and has stalled in the past.

No JB4 or flash here

Mods are : SSR intake, ARK catback

Originally Posted by BoosTonian

Ran into the same issue with the bms intakes. Switched to other intake systems and didn't experience it again.

When I had emailed bms they said it might happen in colder climates and was normal. So why bother making an intake that only works in certain places?

Originally Posted by applesauce683

I have this problem to. Has happened with my previous setup of BMS and with my current Maximum PSi. Definitely gets worse as the weather is getting colder. I have taken out both MAF sensors and cleaned them and lubed the o-ring, still happens.

Is it possible it might be caused by the aluminum intake tubes as opposed to the stock plastic? Do people with carbon fiber intakes have this problem?

Same deal here guys. I'm running BMS intakes, tune, dps's, among other things. The weather just started getting somewhat cold here in LA. First happened 3 days ago, early in the morning about 47 degrees Fahrenheit. Actually was the 3rd time this happened, and always on cold days/cold starts, But this time car stalled on me. The other times it just rough started, sputterd a bit, & rpms jumped up and down real quick to about 2.5 - 3 k . I highly doubt it's the MAF's causing this, because why would it do this only on cold days. Seems like this is an issue with other brand intakes as well, but mainly BMS is what I've heard having the problem.

[4everkidd]

I do not touch the throttle at any point during this video.



Edit: weather was about -5 degrees Celsius at the time of filming, another thing to note was how rich the exhaust smelt... I'm running oem DP's

[Bashar368]

MAF

[MLP17]

Originally Posted by 4everkidd

I do not touch the throttle at any point during this video.



Edit: weather was about -5 degrees Celsius at the time of filming, another thing to note was how rich the exhaust smelt... I'm running oem DP's

This is the exact same thing that was happening to me. I took the intakes out which i really did NOT want to because they sound soooo good but i couldnt take the rough idle anymore. After i took them out and went back to stock intake, the car ran perfect again.

[CaryTheLabelGuy]

Check all your couplings and make sure there are no leaks.

At idle, the engine is in vacuum and if there are leaks in the intake/charge pipes, unmetered air will be allowed to leak into the intake tract and can cause these issues.

[chewbakam4]

Looks like MAF to me as well.

[4everkidd]

Originally Posted by chewbakam4

Looks like MAF to me as well.

I will attack it today and report back gents.

If the issue persists first thing I will replace will be the air filters; try something from Donaldson.

[mazaa93]

Getting the Eventuri system installed next week... Hope I don't run into this problem.

Anyone know if the Eventuri system has any problems??

[4everkidd]

Originally Posted by 4everkidd

I will attack it today and report back gents.

If the issue persists first thing I will replace will be the air filters; try something from Donaldson.

Issue persists and has gotten worse with the worsening winter weather... I'm going to check everything AGAIN, and clean my MAF AGAIN this weekend.

If the issue sticks around I am going to have to tear out the CAI

[applesauce683]

Originally Posted by 4everkidd

Issue persists and has gotten worse with the worsening winter weather... I'm going to check everything AGAIN, and clean my MAF AGAIN this weekend.

If the issue sticks around I am going to have to tear out the CAI

I really think it has something to do with the aluminum maf housing. I haven't heard of anyone with plastic or carbon fiber having this issue.

[4everkidd]

Originally Posted by applesauce683

I really think it has something to do with the aluminum maf housing. I haven't heard of anyone with plastic or carbon fiber having this issue.

I will remove the intake tubes and try hitting them with cerakote or plastidip to try and insulate the housing although I'm not sure heat conductivity / capacity would cause this type of issue. Regardless prior to startup Al, CF, or plastic would all be the same static temperature.

I also haven't heard anyone with plastic or CF in a cold weather environment chime in.

[applesauce683]

Originally Posted by 4everkidd

I will remove the intake tubes and try hitting them with cerakote or plastidip to try and insulate the housing although I'm not sure heat conductivity / capacity would cause this type of issue. Regardless prior to startup Al, CF, or plastic would all be the same static temperature.

I also haven't heard anyone with plastic or CF in a cold weather environment chime in.

I'm thinking it might have something to do with thermal expansion. Aluminum is much more susceptible to that than CF or plastic. But I really have no clue, all I know is that it is annoying as hell.

[4everkidd]

Originally Posted by applesauce683

I'm thinking it might have something to do with thermal expansion. Aluminum is much more susceptible to that than CF or plastic. But I really have no clue, all I know is that it is annoying as hell.

There is an o-ring on the MAF sensor which would maintain a seal; and at lower temps you would be dealing with contraction, not expansion, making the seal tighter if anything.

[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.

[applesauce683]

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.

[BoosTonian]

Originally Posted by applesauce683

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

Sorry to hear that.