[Dave92N54]

Originally Posted by 30FF_

Like stated check all you vacuum lines and intercooler connections at the bottom of the car
Check if the o ring is in there and clipped on, oil temp also seems low wouldnt push the car that much cold

Just to clear up, his temp is in Celsius. He's at about 190F which is perfectly fine.

[Asreegan]

Originally Posted by Saif2018

If I'm reading this correct and your Datalog is showing HPFP and LPFP in bar,

LPFP is dropping seriously low, under 50 psi, this is probably why you have the 2AAF code.

HPFP seems to be OK.

Well noted..Thank you guys..will get the lpfp changed..appreciate all your comments..

[Aussieatlarge]

Hi
I recently pulled out my JB4 which I was running with MHD and BEF. I have been really impressed with the drivability of the MHD tune without the JB4. Also (and I am not sure if this is even possible), the xHP flash seems to be more effective without JB4 (crisper changes in Sport Mode).

But...I am now getting 30FF errors. I suspect that the JB4 may have been masking an issue due to the way it has an adaptive tune. Either I have a boost issue (boost leak, vacuum issue, boost solenoid issue) or the target curve is too aggressive.
https://datazap.me/u/aussieatlarge/b...og=0&data=3-20

Stock Turbos
BMS DCI
VRSF DP
BMS Charge Pipe
Tial BOV
BMS vacuum adaptor
Helix 5" Stepped Intercooler

[Saif2018]

Originally Posted by Aussieatlarge

Hi
I recently pulled out my JB4 which I was running with MHD and BEF. I have been really impressed with the drivability of the MHD tune without the JB4. Also (and I am not sure if this is even possible), the xHP flash seems to be more effective without JB4 (crisper changes in Sport Mode).

But...I am now getting 30FF errors. I suspect that the JB4 may have been masking an issue due to the way it has an adaptive tune. Either I have a boost issue (boost leak, vacuum issue, boost solenoid issue) or the target curve is too aggressive.
https://datazap.me/u/aussieatlarge/b...og=0&data=3-20

Stock Turbos
BMS DCI
VRSF DP
BMS Charge Pipe
Tial BOV
BMS vacuum adaptor
Helix 5" Stepped Intercooler

MHD has map support for XHP so it makes sense it runs better. Personally never ran JB4 but did hear about inconsistencies in boost fluctuations from JB4, no idea if it's at fault.

Follow this guide to resolve 30FF code... It's likely you have a boost leak, start with vacuum lines (cheapest) and check all your connection points including charge pipe bov etc

https://bmwtuning.co/bmw-n54-30ff-en...-repair-guide/

[studio54]

Originally Posted by Aussieatlarge

Hi
I recently pulled out my JB4 which I was running with MHD and BEF. I have been really impressed with the drivability of the MHD tune without the JB4. Also (and I am not sure if this is even possible), the xHP flash seems to be more effective without JB4 (crisper changes in Sport Mode).

But...I am now getting 30FF errors. I suspect that the JB4 may have been masking an issue due to the way it has an adaptive tune. Either I have a boost issue (boost leak, vacuum issue, boost solenoid issue) or the target curve is too aggressive.
https://datazap.me/u/aussieatlarge/b...og=0&data=3-20

Stock Turbos
BMS DCI
VRSF DP
BMS Charge Pipe
Tial BOV
BMS vacuum adaptor
Helix 5" Stepped Intercooler

Seen your new log.

Probably a boost leak for me.

Just between the shift, your BOV release pressure, when pressure come back, sensor quickly shows a good pressure for a very short moment, then it starts leaking again as the pressure don't hold and leak somewhere in your piping.

For the reason above i think you should check big pipings first (chargepipe, intercooler, BOV also spring), and if you found nothing, check/replace vacuum lines (cheap) and finally boost solenoids.

[Aussieatlarge]

Originally Posted by studio54

Seen your new log.

Probably a boost leak for me.

Just between the shift, your BOV release pressure, when pressure come back, sensor quickly shows a good pressure for a very short moment, then it starts leaking again as the pressure don't hold and leak somewhere in your piping.

For the reason above i think you should check big pipings first (chargepipe, intercooler, BOV also spring), and if you found nothing, check/replace vacuum lines (cheap) and finally boost solenoids.

Thank you. I suspect the BOV. I think it is always hissing. TIAL. Not sure on the spring

[studio54]

Originally Posted by Aussieatlarge

Thank you. I suspect the BOV. I think it is always hissing. TIAL. Not sure on the spring

Do you hear it hissing while WOTING ?

Sorry but maybe i am wrong speaking about the spring..
I don't have a BOV, i have Forge DVs, and the way it's installed, any spring force (differents colors) should not create a boost leak problem on WOT cause pressure+spring maintain it closed anyway. The spring color choice is more like for other situations than WOT. Lighter spring will release boost easier/faster on let off.

I don't know if the TIAL BOV works that way too (aka if spring works in cooperation with pressure) but if it's the case, the spring is not your problem.

That said, maybe it has a gasket or something inside?

[JinJja123]

Hey guys, quick question about MHD stage 1 91 vs 93. So I've tested the stage 1 91 map with 91 fuel as well as 93 map with 94 fuel. For some reason I'm getting less boost on the 93 map. Is this normal and should this be expected? I was getting close to 15psi on the 91 map and just under 13.7ish on the 93 map. The graphs in question:

93 Map: https://datazap.me/u/jinjja/stage-1-...og=2&data=3-22

91 Map: https://datazap.me/u/jinjja/stage-1-...og=1&data=3-22

[Saif2018]

Originally Posted by JinJja123

Hey guys, quick question about MHD stage 1 91 vs 93. So I've tested the stage 1 91 map with 91 fuel as well as 93 map with 94 fuel. For some reason I'm getting less boost on the 93 map. Is this normal and should this be expected? I was getting close to 15psi on the 91 map and just under 13.7ish on the 93 map. The graphs in question:

93 Map: https://datazap.me/u/jinjja/stage-1-...og=2&data=3-22

91 Map: https://datazap.me/u/jinjja/stage-1-...og=1&data=3-22

That's fine from my understanding,

93 oct map has higher timing, less boost required (more power than 91 Oct map) 91 oct map has higher boost but less timing,

Your also almost completely on target, so it looks good.

[JinJja123]

Originally Posted by Saif2018

That's fine from my understanding,

93 oct map has higher timing, less boost required (more power than 91 Oct map) 91 oct map has higher boost but less timing,

Your also almost completely on target, so it looks good.

Oh, thats good to hear then! I thought 93 was getting less power cause less boost, but that makes sense. Thank you very much!

[Saif2018]

Originally Posted by JinJja123

Oh, thats good to hear then! I thought 93 was getting less power cause less boost, but that makes sense. Thank you very much!

No problem,

Higher the octane rating, higher the power (assuming the car is running fine with correct supporting mods etc)

E85 maps give the highest power/torque respectively, 93oct is good though.

[Aussieatlarge]

Originally Posted by studio54

Do you hear it hissing while WOTING ?

Sorry but maybe i am wrong speaking about the spring..
I don't have a BOV, i have Forge DVs, and the way it's installed, any spring force (differents colors) should not create a boost leak problem on WOT cause pressure+spring maintain it closed anyway. The spring color choice is more like for other situations than WOT. Lighter spring will release boost easier/faster on let off.

I don't know if the TIAL BOV works that way too (aka if spring works in cooperation with pressure) but if it's the case, the spring is not your problem.

That said, maybe it has a gasket or something inside?

Originally Posted by studio54

Do you hear it hissing while WOTING ?

Sorry but maybe i am wrong speaking about the spring..
I don't have a BOV, i have Forge DVs, and the way it's installed, any spring force (differents colors) should not create a boost leak problem on WOT cause pressure+spring maintain it closed anyway. The spring color choice is more like for other situations than WOT. Lighter spring will release boost easier/faster on let off.

I don't know if the TIAL BOV works that way too (aka if spring works in cooperation with pressure) but if it's the case, the spring is not your problem.

That said, maybe it has a gasket or something inside?

Didn't get a chance to look for leaks but i can definitely hear a whistle at low rpm and low revs. Quick look at TIAL at idle it is shut, any throttle at all (steady 1500 rpm in neutral) it is open (which may be the noise i can hear).

[studio54]

Originally Posted by Aussieatlarge

Didn't get a chance to look for leaks but i can definitely hear a whistle at low rpm and low revs. Quick look at TIAL at idle it is shut, any throttle at all (steady 1500 rpm in neutral) it is open (which may be the noise i can hear).

On steady RPM (not in boost), vacuum build up in the intake manifold, so it's probably normal that they open a bit when rpm stabilised ? how ever if you snap the throttle it should shut.

If you suspect your TIAL BOV, maybe check if there is a o ring gasket between TIAL and CP, or check clamps and so on.

Let us know if you found something.

[Aussieatlarge]

Originally Posted by studio54

On steady RPM (not in boost), vacuum build up in the intake manifold, so it's probably normal that they open a bit when rpm stabilised ? how ever if you snap the throttle it should shut.

If you suspect your TIAL BOV, maybe check if there is a o ring gasket between TIAL and CP, or check clamps and so on.

Let us know if you found something.

Thx

Which means that whenever there is more vacuum in the manifold than at idle, the BOV will open. Which would explain the whistle when driving gently. I am sure that i read somewhere that this was by design to keep the turbo spooling for fast response when you suddenly nail it.

Of course i still need to look for the leak.

[studio54]

Originally Posted by Aussieatlarge

Thx

Which means that whenever there is more vacuum in the manifold than at idle, the BOV will open. Which would explain the whistle when driving gently. I am sure that i read somewhere that this was by design to keep the turbo spooling for fast response when you suddenly nail it.

Of course i still need to look for the leak.

Yep i think so.

On stock DV you can't see or hear it cause there are the return hoses, but it's open and hissing at idle and when cruising to keep turbos spooled a bit for faster response.

Synapse BOV does this too and is even open at idle :

(not sure with TIAL but it should work more or less the same)

[m335ng]

Hey everyone

Car
2011 335i
FBO
Stock turbos
3.5 bar map
New boost solenoid, spark plugs, hpfp, stage 2 lpfp and vacuum lines are good

Can’t figure out what’s wrong with my car when I run stage 2+ 91oct. Looks like the boost build is slow not meeting req. boost levels and then overboosting req. levels to 26.5lbs!!?? Few other things but that stuck out the most. I also attached stock map 0 and it looks better. Is there something I should be looking at or is it just the tune? Any help is appreciated

By the way I’m in Denver so 5280ft elevation

Thanks

https://datazap.me/u/mengkmoua/stock...og=0&data=4-15

https://datazap.me/u/mengkmoua/stg-2...og=0&data=4-15

[Dave92N54]

Originally Posted by m335ng

Hey everyone

Car
2011 335i
FBO
Stock turbos
3.5 bar map
New boost solenoid, spark plugs, hpfp, stage 2 lpfp and vacuum lines are good

Can’t figure out what’s wrong with my car when I run stage 2+ 91oct. Looks like the boost build is slow not meeting req. boost levels and then overboosting req. levels to 26.5lbs!!?? Few other things but that stuck out the most. I also attached stock map 0 and it looks better. Is there something I should be looking at or is it just the tune? Any help is appreciated

By the way I’m in Denver so 5280ft elevation

Thanks

https://datazap.me/u/mengkmoua/stock...&data=4-15

https://datazap.me/u/mengkmoua/stg-2...&data=4-15

Have you checked the box for a 3.5bar map on MHD?

[m335ng]

Originally Posted by Dave92N54

Have you checked the box for a 3.5bar map on MHD?

Yes I did

[30FF_]

Hey guys so posted about my weird lpfp gauges a page back and finally replaced FPR and still no Bueño
I've changed FPR , hpfp , lpfp sensor and fuel rail , Lpfp with stage 2 BmP, still nothing only things left to change are ekp3 which I have because mine is 09 and o2 sensors but I'm pulling no codes just your regular 2AAE fuel pump code any help what this could be car runs fine and pulls hard no misfires
But AFRs reach 200 :
Running e50/91 shell
Run was on MHD Stage 2 + map V9
Bmw 335i e92 09 FBO +inlets


https://datazap.me/u/30ff/log-161449...&data=3-25

[Neg89]

Hello comunity . I am from europe can u take a look.

https://datazap.me/u/ng/eur-95oct-vt...og=0&data=3-21

E89 Z4 3.5i

Wagner evo FMIC
MMP inlets 3”
TTE500 turbos
Catless DP
MHD BQ tune
Mosselmann Oil thermostat
OCC
K&N drop in air filter

[Saif2018]

Originally Posted by Neg89

Hello comunity . I am from europe can u take a look.

https://datazap.me/u/ng/eur-95oct-vt...og=0&data=3-21

E89 Z4 3.5i

Wagner evo FMIC
MMP inlets 3”
TTE500 turbos
Catless DP
MHD BQ tune
Mosselmann Oil thermostat
OCC
K&N drop in air filter

Loads of timing corrections, zero LPFP?

Have you checked your lpfp sensor?

Boost fluctuating too,

[Neg89]

Originally Posted by Saif2018

Loads of timing corrections, zero LPFP?

Have you checked your lpfp sensor?

Boost fluctuating too,

If you mean "check" in mhd logging then, yes.

This is E89 Z4, maybe it have not LPFP SENSOR.

This is first drive after winter, but fuel is new.
Here are my previous logs, before winter.

https://datazap.me/u/ng/bq-v7-boost-...og=0&data=3-21