What would cause Timing and missing boost target by 2 psi?

AllenM335is · 05-27-2019, 01:22 AM

n54 56k miles tuned since 48k
new plugs, fresh valve cleaning
experienced timing as bad as -7 at one point

JM98 · 05-27-2019, 01:39 AM

Quote:

Originally Posted by AllenM335is

n54 56k miles tuned since 48k
new plugs, fresh valve cleaning
experienced timing as bad as -7 at one point

Octane would be most obvious. Do you have a log?

AllenM335is · 05-27-2019, 02:40 AM

Quote:

Originally Posted by JM98

Octane would be most obvious. Do you have a log?

https://datazap.me/u/allenmessi
i haven't uploaded any recently but check the timing+low boost one

arkie6 · 05-27-2019, 10:42 AM

I didn't open the log. What does it show for IAT? If IAT is high, it might be due to blocked intercooler fins.

AllenM335is · 05-27-2019, 12:19 PM

Quote:

Originally Posted by arkie6

I didn't open the log. What does it show for IAT? If IAT is high, it might be due to blocked intercooler fins.

i have arm 5 fmic w upgraded pipes, so they don't go above 100 in most of my logs.

AllenM335is · 05-27-2019, 12:22 PM

Quote:

Originally Posted by arkie6

I didn't open the log. What does it show for IAT? If IAT is high, it might be due to blocked intercooler fins.

i have upgraded fmic iat are low

JM98 · 05-27-2019, 09:33 PM

What are your mod's? Your WGDC between banks is pretty off, but other than that can't see anything too bad with the log. I'd try adding octane and checking your vacuum lines for leaks/breaks and double checking any clamps that see boost.

AllenM335is · 05-28-2019, 02:32 AM

Quote:

Originally Posted by JM98

What are your mod's? Your WGDC between banks is pretty off, but other than that can't see anything too bad with the log. I'd try adding octane and checking your vacuum lines for leaks/breaks and double checking any clamps that see boost.

Mhd stage 2+
ARM 5 Fmic w the 5hp stencil
upgraded fmic pipe
VRSF chargepipe dv venting to mother nature
ngk plugs gapped to .22
CNT downpipes 3in
RB stock location 2in inlets

MarcGray87 · 05-28-2019, 02:34 AM

It could be caused most probably by Octane.

AllenM335is · 05-28-2019, 06:26 AM

Quote:

Originally Posted by MarcGray87

It could be caused most probably by Octane.

i'm leaning towards that too because on e85 i get no timing corrections at all but lpfp can't hold up to it.

JM98 · 05-30-2019, 09:28 PM

I always add a gallon on e85 to my pump gas tunes to bump up octane

turbohugh · 05-30-2019, 11:19 PM

[QUOTE=AllenM335is;24839495]

Quote:

Originally Posted by JM98

What are your mod's?
RB stock location 2in inlets

Are the stock turbos and inlets sealing ? Just a thought have you done any boost leak testing ?

AllenM335is · 05-31-2019, 05:12 AM

Quote:

Originally Posted by JM98

I always add a gallon on e85 to my pump gas tunes to bump up octane

i used to do this my lpfp started to dip under 50 psi lately so i stopped doing that.

AllenM335is · 05-31-2019, 05:14 AM

[QUOTE=turbohugh;24853021]

Quote:

Originally Posted by AllenM335is

Are the stock turbos and inlets sealing ? Just a thought have you done any boost leak testing ?

hmm, Not really, inlets were done by pervious owner so i'm not sure, i doubt there is a leak as i was hitting 18.6 psi on earlier tunes. i changed coils and i got the lost performance back i just have to log to check if i'm hitting boost target and check timing. car feels alive again w new coils.

NoGuru · 05-31-2019, 06:16 AM

It's the 5 HP stencil,

Why not upgrade the lpfp?
This bracket and a Walbro 450 and you should be all set for about $150 with a stage 2 kit.

This is what I have in my car and I am currently running E55 blend with no issues.

http://www.bm-parts.com/index.php?ro...search=bracket

AllenM335is · 05-31-2019, 07:47 AM

Quote:

Originally Posted by NoGuru

It's the 5 HP stencil,

Why not upgrade the lpfp?
This bracket and a Walbro 450 and you should be all set for about $150 with a stage 2 kit.

This is what I have in my car and I am currently running E55 blend with no issues.

http://www.bm-parts.com/index.php?ro...search=bracket

The best way to put it is "i'm broke"

TheMidnightNarwhal · 05-31-2019, 07:48 AM

If you wanna confirm octane problem just get the highest octane gas (no e85) you can get and run the lowest octane map for a log

AllenM335is · 05-31-2019, 09:37 AM

Quote:

Originally Posted by TheMidnightNarwhal

If you wanna confirm octane problem just get the highest octane gas (no e85) you can get and run the lowest octane map for a log

most likely wasn't octane related as i had the same problem on stock tune.

AllenM335is · 06-03-2019, 12:31 AM

https://datazap.me/u/allenmessi/new-...og=0&data=3-22
New coils and new log, still having issues with boost not hitting target and spool timr• can anyone tell me what looks wrong w this log?

NoGuru · 06-03-2019, 09:15 AM

Quote:

Originally Posted by AllenM335is

https://datazap.me/u/allenmessi/new-...og=0&data=3-22
New coils and new log, still having issues with boost not hitting target and spool timr• can anyone tell me what looks wrong w this log?

It actually looks pretty good to me.
The boost is very close to target which is all you need since it is constantly moving target.

05-27-2019, 01:22 AM	#1
AllenM335is Private First Class 14 Rep 150 Posts Drives: 2012 bmw 335is Join Date: Mar 2019 Location: michigan iTrader: (1)	What would cause Timing and missing boost target by 2 psi? n54 56k miles tuned since 48k new plugs, fresh valve cleaning experienced timing as bad as -7 at one point
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05-27-2019, 10:42 AM	#4
arkie6 Lieutenant 397 Rep 433 Posts Drives: 2008 BMW 335i sedan Join Date: Aug 2014 Location: Russellville, AR iTrader: (0) Garage List 2008 BMW 335i [0.00]	I didn't open the log. What does it show for IAT? If IAT is high, it might be due to blocked intercooler fins.
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05-27-2019, 09:33 PM	#7
JM98 Lieutenant 391 Rep 532 Posts Drives: 2009 135i Join Date: May 2016 Location: SoCal iTrader: (0)	What are your mod's? Your WGDC between banks is pretty off, but other than that can't see anything too bad with the log. I'd try adding octane and checking your vacuum lines for leaks/breaks and double checking any clamps that see boost.
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05-28-2019, 02:34 AM	#9
MarcGray87 Registered 0 Rep 2 Posts Drives: BMW 3 series Join Date: May 2019 Location: Nigeria iTrader: (0)	It could be caused most probably by Octane.
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05-30-2019, 09:28 PM	#11
JM98 Lieutenant 391 Rep 532 Posts Drives: 2009 135i Join Date: May 2016 Location: SoCal iTrader: (0)	I always add a gallon on e85 to my pump gas tunes to bump up octane
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05-31-2019, 06:16 AM	#15
NoGuru Major 772 Rep 1,418 Posts Drives: 335is Join Date: Apr 2017 Location: MI iTrader: (0) Garage List 2021 Chevy Silverad ... [0.00] 2002 Jeep Cherokee [0.00] 2014 CTS [0.00] 2011 335is [0.00]	It's the 5 HP stencil, Why not upgrade the lpfp? This bracket and a Walbro 450 and you should be all set for about $150 with a stage 2 kit. This is what I have in my car and I am currently running E55 blend with no issues. http://www.bm-parts.com/index.php?ro...search=bracket __________________ 2011 335is DCT BQ Tuning / BMS CAI / VRSF kittyless DP's / Synapse BOV and charge pipe / 7" VRSF Race FMIC / Walbro 535 and 450 on BMP4 / E90 tune / Diff Brace / PR Coils / Relocation Inlets / DAW Stage3+ Turbos / MMP port injection / xHP Stage 3 / FPR and -6 fuel lines
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05-31-2019, 07:48 AM	#17
TheMidnightNarwhal Major General 2657 Rep 6,290 Posts Drives: 11' 335is DCT Join Date: Jun 2015 Location: Gatineau, Quebec iTrader: (0)	If you wanna confirm octane problem just get the highest octane gas (no e85) you can get and run the lowest octane map for a log
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06-03-2019, 12:31 AM	#19
AllenM335is Private First Class 14 Rep 150 Posts Drives: 2012 bmw 335is Join Date: Mar 2019 Location: michigan iTrader: (1)	https://datazap.me/u/allenmessi/new-...og=0&data=3-22 New coils and new log, still having issues with boost not hitting target and spool timr• can anyone tell me what looks wrong w this log?
	Appreciate 0 Quote