[MysticRob]

Originally Posted by bcjoel11

I gotcha. I have had the car tuned for quite some time now just as of recently the car has been falling flat on its face when I request serious power. Normal driving or gradual acceleration the car builds much more boost than the 2psi it is in the logs. I just didn't wanna spend a grand plus for injectors and coils when it was much simpler fix.

Here, read this thread and test accordingly. Vacuum leaks sound like your problem, especially with all those miles.

http://www.e90post.com/forums/showthread.php?t=894084

[SparcoNL]

Originally Posted by SparcoNL

Made a quick and dirty log after updating the JB4 to G5_ISO_32_6 and the latest MHD 3/15/17 Map Release Pump map.

Stock 335i running JB4 map 2 on 98octane.
Walnutblasted 1000kms ago and new vacuumhoses.

What is your opinion guy's? looks healty?

http://datazap.me/u/sparconl/jb4-mhd...log=0&data=1-4

[xdennis]

Hello everyone,

3rd gear pull. Stock map, no mods. 100k miles

I just replaced all of my fuel injectors with the latest version, fixed two oil leaks, new oem plugs. I'm interesting in modding with bolt ons now.

http://datazap.me/u/xdennis/log-1490...g=0&data=20-21

from what I can tell, timing looks okay (no corrections on this pull) From time to time i'll get a correctoin but never below -3. HPFP looks okay (rail pressure does not dip below 1500).

What other log parameters do you look at? I'm trying to learn how to read the logs


Bumped up to stage 1 +
http://www.datazap.me/u/xdennis/log-...g=0&data=14-20

My LPFP looks like it's struggling to keep up
My IATs get pretty high - FMIC is highly suggested on this tune anyway, so thats in the works
I've got timing corrections all over the place

[Blue E92]

Got a stg 2 lpfp installed before I go stage 2+ because my low pressure was dipping to low 50s. Now when I go wot it bumps up to ~85 and remains there until car is restarted. I have seen a few posts about it however it seems there is no answer to what fixes it. I've seen people who have replaced ekp module or lpfr/filter while some have just had issue go away.
http://www.datazap.me/u/bluee92/log-...olo=12&mark=89

[Sgop335]

Originally Posted by xdennis

Hello everyone,

3rd gear pull. Stock map, no mods. 100k miles

I just replaced all of my fuel injectors with the latest version, fixed two oil leaks, new oem plugs. I'm interesting in modding with bolt ons now.

http://datazap.me/u/xdennis/log-1490...g=0&data=20-21

from what I can tell, timing looks okay (no corrections on this pull) From time to time i'll get a correctoin but never below -3. HPFP looks okay (rail pressure does not dip below 1500).

What other log parameters do you look at? I'm trying to learn how to read the logs


Bumped up to stage 1 +
http://www.datazap.me/u/xdennis/log-...g=0&data=14-20

My LPFP looks like it's struggling to keep up
My IATs get pretty high - FMIC is highly suggested on this tune anyway, so thats in the works
I've got timing corrections all over the place

All good observations. Add you may have a boost leak.

[xdennis]

Originally Posted by Sgop335

All good observations. Add you may have a boost leak.

From a quantitative perspective, what gives you this impression? I'm not suggesting you're wrong or disagree, I'd just like to know what metrics you're looking at.

Additionally, regarding the timing corrections, is usually indicative of bad coils? Spark plugs changed with OEM plugs less than 10k miles ago.

[Sgop335]

Originally Posted by xdennis

From a quantitative perspective, what gives you this impression? I'm not suggesting you're wrong or disagree, I'd just like to know what metrics you're looking at.

Additionally, regarding the timing corrections, is usually indicative of bad coils? Spark plugs changed with OEM plugs less than 10k miles ago.

Metrics, look at boost target and boost. Notice how you are 2psi or more off the target. Your log parameters also need to be increased. hope you dont have the silly jb+ w your flash.
Corrections, are related to your octane. quite large corrections. what octane are you running?

[xdennis]

Ahh, I see.

I don't have the JB anymore, I'm just using the MHD.

I'm currently running 93 octane.

I did increase the rattle reduction, to my understanding this also creates lag as the flap never fully closes enough to rattle? Could this cause the boost issue:

--note: I just reviewed pre and post charts.
I see in stock mode, in the 4k range, it's much closer (Boost PSI vs Target) than in the Stage 1+

Should there be some gap, atleast down low? Or even in the sub 4k RPM, it should be very close to what the boost target is? (I'm assuming you should expect some turbo lag?)

Also: Can you help me better identify the air fuel ratio and when I'm too lean, and how lean is to lean and visca verca?

[Sgop335]

Originally Posted by xdennis

Ahh, I see.

I don't have the JB anymore, I'm just using the MHD.

I'm currently running 93 octane.

I did increase the rattle reduction, to my understanding this also creates lag as the flap never fully closes enough to rattle? Could this cause the boost issue:

--note: I just reviewed pre and post charts.
I see in stock mode, in the 4k range, it's much closer (Boost PSI vs Target) than in the Stage 1+

Should there be some gap, atleast down low? Or even in the sub 4k RPM, it should be very close to what the boost target is? (I'm assuming you should expect some turbo lag?)

Also: Can you help me better identify the air fuel ratio and when I'm too lean, and how lean is to lean and visca verca?

Take a look at my log below and see if helps. Yes there is ofcourse a short ramp up period which you can see in my log as well.
Imo, af ratio more than 13 -14 under boost is lean. Pref 12s or high 11. In the spool mode however it gets very lean ~15s.

[turekaj]

I recently did a walnut blast and have the following mods:
116k miles
inlets, kittyless dps, PE mod, 5 inch stepped intercooler, charge pipe with tial knockoff bov, stage 2 fuel-it fuel pump, injectors 1-3 have been replaced within the last 20k miles, 1 coilpack has been replaced in the last 20k miles (don't have history before 84k miles, bought the car used last year).

Check out the 3rd gear pull in this log. For some reason STFT are sweeping and loads of KR.

http://datazap.me/u/turekaj89/after-...10-11-21-23-24

Note, there are 2 logs at that link, the other one is a 2nd gear + partial 3rd gear double pull, and 2nd has no KR at all, 3rd has KR throughout.

This was on the OTS Stage2+ MHD tune with 93 octane Shell V-Power gas here in Texas.

Any ideas?

[zooch7]

Please take a look. Just switched to MHD from Jb4. Wanna see how things look datalog wise. Thanks for your time guys

http://datazap.me/u/antoniomcd24/e40...og=0&data=3-21

FBO, Inlets, Muffler Delete.

[TheeGovernor]

Can someone take a look at my logs. I am trying to figure out why I am getting poor mpgs. Here is a log of me cruising down the highway at 60. I can post a different log if need be. Stock map.

http://www.datazap.me/u/theegovernor...16-17-18-23-30

[Shane303]

Originally Posted by TheeGovernor

Can someone take a look at my logs. I am trying to figure out why I am getting poor mpgs. Here is a log of me cruising down the highway at 60. I can post a different log if need be. Stock map.

http://www.datazap.me/u/theegovernor...16-17-18-23-30

What is "poor" ?

[TheeGovernor]

Originally Posted by Shane303

What is "poor" ?

22mpg going down the highway vs 30mpg

[Shane303]

Originally Posted by zooch7

Please take a look. Just switched to MHD from Jb4. Wanna see how things look datalog wise. Thanks for your time guys

http://datazap.me/u/antoniomcd24/e40...og=0&data=3-21

FBO, Inlets, Muffler Delete.

Looks healthy. Which intercooler? IAT's rise quickly
LPFP dips below 50 in a few spots, but I wouldn't worry too much as the HPFP holds strong and trims look good.

This is the most powerful "OTS" map you can use.

[kisarci]

Originally Posted by TheeGovernor

22mpg going down the highway vs 30mpg

Perhaps a faulty o2 sensor? Pre-cat o2 sensors to be specific. Those play a big roll on your fuel trims. Or maybe try resetting adaptations?

[TheeGovernor]

Originally Posted by kisarci

Perhaps a faulty o2 sensor? Pre-cat o2 sensors to be specific. Those play a big roll on your fuel trims. Or maybe try resetting adaptations?

Sensors are relatively new and there are no codes. I will try resetting adaptations.

[antoniomcd24]

Originally Posted by Shane303

Looks healthy. Which intercooler? IAT's rise quickly
LPFP dips below 50 in a few spots, but I wouldn't worry too much as the HPFP holds strong and trims look good.

This is the most powerful "OTS" map you can use.

At what point should i worry about lpfp? since you are saying that my hpfp looks pretty strong? i want to see if can up the e85 to e50..
p.s im new in this forum so my friend had to post the datalog for me.

thank you in advance!

Originally Posted by antoniomcd24

At what point should i worry about lpfp?

If you want to add any more E than whatever is currently in there, you need to upgrade the pump.

[antoniomcd24]

http://www.datazap.me/u/antoniomcd24...ata=3-13-22-23

so on this run I did 50% e85? how does it look?

[LMB335IS]

Originally Posted by antoniomcd24

http://www.datazap.me/u/antoniomcd24...ata=3-13-22-23

so on this run I did 50% e85? how does it look?

Too much E. Your LPFP is tanking. Is this a MHD OTS tune?

[ldyzluvdis06]

Feedback, welcome:

E90, fbo, inlets, stage 2 lpfp, mhd e60

http://www.datazap.me/u/ldyzluvdis06...13-16-17-23-27

Looks as if I may have a miniscule leak somewhere since I'm 1-2psi off of target, any advice where to look would also be helpful.