[yanboogie]

2014 F30 n55 RWD running MHD 2+.

I had this issue pop up where on decel and mainly going from 3-2>2-1 the car will do what sounds like burbles but more so as if it's gargling. Even If I disable burbles completely. On the stock tune file, it does the same thing. It's never done it before. It also seems as if there is more of a boost delay at low RPMs but pulls fine throughout the rpm range. Personally, I feel like the car should be faster than what it feels like?

Doesn't seem like I'm having HPFP drop nor do the logs show that.

I've replaced the coils, spark plugs with NGK's @ .22, VRSF IC, catless, charge pipes, MST turbo inlet, XHP stage 3, I've cleaned the Vanos solenoids, cleaned map and maf.

You can check out some of the latest logs I have on my datazap profile.
https://datazap.me/u/yanboogie

[thejeremyman9]

No codes or shadow codes? Nothing really looks wrong in the most recent log.

I never really log decel so i am not sure if the AFR typically trails like that.

[n55david]

Originally Posted by yanboogie

2014 F30 n55 RWD running MHD 2+.

I had this issue pop up where on decel and mainly going from 3-2>2-1 the car will do what sounds like burbles but more so as if it's gargling. Even If I disable burbles completely. On the stock tune file, it does the same thing. It's never done it before. It also seems as if there is more of a boost delay at low RPMs but pulls fine throughout the rpm range. Personally, I feel like the car should be faster than what it feels like?

Doesn't seem like I'm having HPFP drop nor do the logs show that.

I've replaced the coils, spark plugs with NGK's @ .22, VRSF IC, catless, charge pipes, MST turbo inlet, XHP stage 3, I've cleaned the Vanos solenoids, cleaned map and maf.

You can check out some of the latest logs I have on my datazap profile.
https://datazap.me/u/yanboogie

that's normal

[yanboogie]

Originally Posted by thejeremyman9

No codes or shadow codes? Nothing really looks wrong in the most recent log.

I never really log decal so I am not sure if the AFR typically trails like that.

I've had KOMBI code but it seems some people with mhd have had that pop up for them as well, all seemed to be 14 models. This is the last one I've had, but BDC is a new one, never saw that one actually and wasnt there when this issue started happening

Originally Posted by Phantom10R

that's normal

I've heard that's normal from others as well but why would it start doing that only now? Ran the car on a tune for 6 months it was never like this before. It doesn't follow the same pattern, it'll gargle/burble some times longer sometimes longer even with the function disabled? Someone told me it might be the injectors starting to fail but I haven't noticed any wet spark plugs or hard cold starts. Figured I'd ask around here and see.

[thejeremyman9]

Originally Posted by yanboogie

I've had KOMBI code but it seems some people with mhd have had that pop up for them as well, all seemed to be 14 models. This is the last one I've had, but BDC is a new one, never saw that one actually and wasnt there when this issue started happening



I've heard that's normal from others as well but why would it start doing that only now? Ran the car on a tune for 6 months it was never like this before. It doesn't follow the same pattern, it'll gargle/burble some times longer sometimes longer even with the function disabled? Someone told me it might be the injectors starting to fail but I haven't noticed any wet spark plugs or hard cold starts. Figured I'd ask around here and see.

My car also randomly has a "burble" sound on decel in comfort mode when i historically had zero burbles in that mode. IT also started several months after being tuned and i have made zero hardware or software changes during that time period. It might just be a small audible pop or two in the exhaust. Yes, it is unexpected that it started without a clear explanation but i don't lose sleep over it when i have zero codes, good datalogs, and the car runs perfect.

[Pussiwillow]

Probably doesn't help but I haven't touched my MHD settings in months and have very subtle burbles on sport mode, was doing a few pulls out of town and on decel it was throwing some very loud bangs out of no where and occasionally comes and goes, I have no idea but ya

[thejeremyman9]

Originally Posted by Pussiwillow

Probably doesn't help but I haven't touched my MHD settings in months and have very subtle burbles on sport mode, was doing a few pulls out of town and on decel it was throwing some very loud bangs out of no where and occasionally comes and goes, I have no idea but ya

Yup mine also became a bit inconsistent. I always ran OEM settings, which meant nothing in comfort mode. But i get random things in confort now, with no hardware or software changes. I don't consider it a "problem"

[yanboogie]

Ok cool, so let's say it is good and moving on.

Another thing I found weird is that on my buddies m235, he runs the same stg2+ map, and hits 18pounds through the whole power band pretty much, mine pretty much doesn't go over 15? Would that be maybe because of a bad boost solenoid? I only ask this because I always felt my car is slower than it should be... when driving his I can tell its running more boost and is keeping boost through the whole power band.

p,s - I appreciate you guys responding!

[lucasborka]

Originally Posted by yanboogie

Ok cool, so let's say it is good and moving on.

Another thing I found weird is that on my buddies m235, he runs the same stg2+ map, and hits 18pounds through the whole power band pretty much, mine pretty much doesn't go over 15? Would that be maybe because of a bad boost solenoid? I only ask this because I always felt my car is slower than it should be... when driving his I can tell its running more boost and is keeping boost through the whole power band.

p,s - I appreciate you guys responding!

You have an ewg so no boost soleniod, check if you have high wgdc which indicates boost leak. Check wastegate adjustment with ista

[thejeremyman9]

Originally Posted by yanboogie

Ok cool, so let's say it is good and moving on.

Another thing I found weird is that on my buddies m235, he runs the same stg2+ map, and hits 18pounds through the whole power band pretty much, mine pretty much doesn't go over 15? Would that be maybe because of a bad boost solenoid? I only ask this because I always felt my car is slower than it should be... when driving his I can tell its running more boost and is keeping boost through the whole power band.

p,s - I appreciate you guys responding!

Wait are you comparing MHD stage 2+ to MHD stage 2+ or to BM3?

If you are actually comparing MHD to MHD, MHD tunes are load-based so the boost varies depending on ambient conditions to meet load target. Assuming his tune is the same version etc, that's most likely why. You can look at his logs and see if the load target is the same. Also, if you are automatic trans, make sure you have XHP or something to disable torque limits, or that could be another reason.

[BMWILUVU]

There is a possiblity your injectors are starting to become little bit leaky. BMW can run diagnosis and pinpoint it.

[yanboogie]

Originally Posted by lucasborka

You have an ewg so no boost soleniod, check if you have high wgdc which indicates boost leak. Check wastegate adjustment with ista

I'll have to take a look via ista. I could have sworn the boost solenoid is the sensor right near the throttle body that has like a few plastic hardlines going into it. Unless that's for evap? Thanks!

Originally Posted by thejeremyman9

Wait are you comparing MHD stage 2+ to MHD stage 2+ or to BM3?

If you are actually comparing MHD to MHD, MHD tunes are load-based so the boost varies depending on ambient conditions to meet load target. Assuming his tune is the same version etc, that's most likely why. You can look at his logs and see if the load target is the same. Also, if you are automatic trans, make sure you have XHP or something to disable torque limits, or that could be another reason.

I've had BM3, I switched over to MHD. But yeah it's MHD to MHD comarison. He is DCT though. I also do have XHP Stg3, so the tq limits shouldn't be the issue.

Originally Posted by BMWILUVU

There is a possiblity your injectors are starting to become little bit leaky. BMW can run diagnosis and pinpoint it.

These dealers are aids with pricing so i dont even bring my car in for that haha. I also don't have good indie shops near me that focus on bmw performance stuff.

[lucasborka]

Originally Posted by yanboogie

I'll have to take a look via ista. I could have sworn the boost solenoid is the sensor right near the throttle body that has like a few plastic hardlines going into it. Unless that's for evap? Thanks!

I've had BM3, I switched over to MHD. But yeah it's MHD to MHD comarison. He is DCT though. I also do have XHP Stg3, so the tq limits shouldn't be the issue.

These dealers are aids with pricing so i dont even bring my car in for that haha. I also don't have good indie shops near me that focus on bmw performance stuff.

That is for evap unfortanly, the pwg models have boost solenoid that controls vacuum for the wastegate. Ewg is on models from 2014 onwards

[yanboogie]

Originally Posted by lucasborka

That is for evap unfortanly, the pwg models have boost solenoid that controls vacuum for the wastegate. Ewg is on models from 2014 onwards

Gotchya! Thanks for the accurate information! I'll try maybe going for some Bosch oem plugs and see how that goes. Running the NGKS @ .22 and they dont seem to be running as smooth as my old bosch plugs. Gonna keep the stock gap and go from there.

[lucasborka]

Originally Posted by yanboogie

Gotchya! Thanks for the accurate information! I'll try maybe going for some Bosch oem plugs and see how that goes. Running the NGKS @ .22 and they dont seem to be running as smooth as my old bosch plugs. Gonna keep the stock gap and go from there.

Yes, no need to run other plugs than oem. Use stock gap, you want the biggest gap without risking spark blowout for a more complete combustion.

Bosch Zr5tpp330 is the oem one.

Also clean maf while you are at it!

[n55david]

you can't compare bm3 stage 2+ to mhd stage 2+ at all.

you can only compare bm3 stage 2 to mhd stage 2+. those are equal tunes.

[thejeremyman9]

Originally Posted by Phantom10R

you can't compare bm3 stage 2+ to mhd stage 2+ at all.

you can only compare bm3 stage 2 to mhd stage 2+. those are equal tunes.

He said it was MHD to MHD comparison.

But if he thinks his friend is running more boost, we just need logs from their cars to see. I've seen several psi variation in boost target in my own logs depending on atmospheric conditions.

[yanboogie]

Originally Posted by lucasborka

Yes, no need to run other plugs than oem. Use stock gap, you want the biggest gap without risking spark blowout for a more complete combustion.

Bosch Zr5tpp330 is the oem one.

Also clean maf while you are at it!

Maf got cleaned so no issues there. I might just replace both map and maf since im sure they havent been replaced yet.

I'm with you on the stock gap as well, I just wanted to see if there would be any improvement so I gapped em lower.

Originally Posted by Phantom10R

you can't compare bm3 stage 2+ to mhd stage 2+ at all.

you can only compare bm3 stage 2 to mhd stage 2+. those are equal tunes.

Yep, I did mention its mhd 2+ to mhd 2+

Originally Posted by thejeremyman9

He said it was MHD to MHD comparison.

But if he thinks his friend is running more boost, we just need logs from their cars to see. I've seen several psi variation in boost target in my own logs depending on atmospheric conditions.

Here is the thing, we've tested both cars on the same day, same road, same conditions. His was hitting more boost and harder than mine. Thats why i brought that up originally.

[thejeremyman9]

Originally Posted by yanboogie

Maf got cleaned so no issues there. I might just replace both map and maf since im sure they havent been replaced yet.

I'm with you on the stock gap as well, I just wanted to see if there would be any improvement so I gapped em lower.



Yep, I did mention its mhd 2+ to mhd 2+




Here is the thing, we've tested both cars on the same day, same road, same conditions. His was hitting more boost and harder than mine. Thats why i brought that up originally.

Can you explain what you mean by "hitting more boost and harder" - like did he just win a race? Or do you have datalogs for both? Timing corrects and DCT alone could explain one car being faster than the other. We would really need to see the logs to try and understand why.

If you look at my virtual dyno thread you can see how much of a different inconsistent timing on exactly the same map with same car, etc, can make https://f30.bimmerpost.com/forums/sh....php?t=1710794

[n55david]

Originally Posted by thejeremyman9

He said it was MHD to MHD comparison.

But if he thinks his friend is running more boost, we just need logs from their cars to see. I've seen several psi variation in boost target in my own logs depending on atmospheric conditions.

ohhh I missed that.

yeah we need logs. boost leaks all around lol

local guy to me is throwing away a jb4 and mhd because he says it doesn't make power anymore and is buying bootmod3 because he read it's good. all of this happened shortly after his ic install lol. I keep telling him it's a boost leak but his reply is "I used soap and water to test and there is no leak" lol

so OP post a log so we can either see it's fine or you have a boost leak.

[yanboogie]

Originally Posted by thejeremyman9

Can you explain what you mean by "hitting more boost and harder" - like did he just win a race? Or do you have datalogs for both? Timing corrects and DCT alone could explain one car being faster than the other. We would really need to see the logs to try and understand why.

If you look at my virtual dyno thread you can see how much of a different inconsistent timing on exactly the same map with same car, etc, can make https://f30.bimmerpost.com/forums/sh....php?t=1710794

For example, when driving his car, the boost felt like it spooled and reached a higher value way faster than mine. Not sure how to explain it, the best way I could is this, small frame turbo it spools and hits boost later than I would imagine on my car. On his, it came on quicker and peaked higher and I could feel that.

Here Is his account, I think the oldest ones might be when he was having issues but I could be wrong.

https://datazap.me/u/acrelee
https://datazap.me/u/acrelee/log-162...=2-3-4-9-10-16

Originally Posted by Phantom10R

ohhh I missed that.

yeah we need logs. boost leaks all around lol

local guy to me is throwing away a jb4 and mhd because he says it doesn't make power anymore and is buying bootmod3 because he read it's good. all of this happened shortly after his ic install lol. I keep telling him it's a boost leak but his reply is "I used soap and water to test and there is no leak" lol

so OP post a log so we can either see it's fine or you have a boost leak.

My logs are on the front page for my datazap account, you can check the recent ones. I've just about gone over all the connections, Orings a couple of times. Everything seems solid but non the less I haven't done a boost leak test personally yet, which I definitely should.

[thejeremyman9]

Originally Posted by yanboogie

For example, when driving his car, the boost felt like it spooled and reached a higher value way faster than mine. Not sure how to explain it, the best way I could is this, small frame turbo it spools and hits boost later than I would imagine on my car. On his, it came on quicker and peaked higher and I could feel that.

Here Is his account, I think the oldest ones might be when he was having issues but I could be wrong.

https://datazap.me/u/acrelee
https://datazap.me/u/acrelee/log-162...=2-3-4-9-10-16



My logs are on the front page for my datazap account, you can check the recent ones. I've just about gone over all the connections, Orings a couple of times. Everything seems solid but non the less I haven't done a boost leak test personally yet, which I definitely should.

Well in the log of his you posted here and the most recent log in your account you can clearly see he is targeting higher load and about 2psi more boost.