Need help with over boost

[RVA_N55_Fan]

Here is a log when the have engine light comes on but this time it cleared itself
Does anyone have any suggestions?

Full WOT log might be needed as this log doesn't have pedal at 100 which is needed for feedback

[Bmw5150]

Okay today I was finally able to record a log with the issue of the half engine light popping up did not see a reduction in power here is the log

[Bmw5150]

Bump

[Bmw5150]

Here is another log of it throwing code 2906 half engine light

[Cannon @ BMS]

Did you flash the BMS BEF?

[Steve @ BMS/Fuel-It!]

2906 is for a boost leak and your FF is pretty high, as are your duty biases up top.

What does a log on map 1 look like?

[Bmw5150]

Did you flash the BMS BEF?

yes i do have the BEF installed and turned on. downloaded it from here.

I will attempt to do a proper log and pull tomorrow. depending on how traffic to Mexico is.

[Bmw5150]

Here is a log from today. Didn't throw any codes. I forgot to switch to map 1.

[Cannon @ BMS]

Let's see a log on map 1.

[Bmw5150]

Here is a Log of map 1 pull still didn't throw code but I did notice my target was around 3psi higher than my boost

[RVA_N55_Fan]

Here is a Log of map 1 pull still didn't throw code but I did notice my target was around 3psi higher than my boost

Fyi this is not a full log. If it's not a full log not worth posting man.

[Bmw5150]

Sorry I guess I selected the wrong file to load or my log didn't save here is a new log

[RVA_N55_Fan]

Sorry I guess I selected the wrong file to load or my log didn't save here is a new log

I'm thinking pretty a pretty significant boost leak. Experts will additional thoughts.

[Bmw5150]

Today while getting on the freeway code came on so I tried my best to help make it a readable log traction control was engaged and was in fourth gear but was able to bring it up to 6,000 RPM when laid off a throttle code half engine light went away

[Cannon @ BMS]

Please try and capture the check engine when it happens in the log. Thanks!

[Bmw5150]

Do you mean while I'm logging because I thought that's what I did, I cant seem to do it intentionally just got lucky this time. I uploaded the code doc file

[Bmw5150]

Was never able to get issue to pop back up I think it might have to do with temperature won't know till it warms up around Spring or summer time but here is a log for safe measure

[Steve @ BMS/Fuel-It!]

You were running map 4 in that log and you have a flash loaded so you're running less boost than what the ECU expects to see.

Clear all codes and do a log on map 1 to see how that looks.

[Bmw5150]

Oh my apologies I thought I was. Here is three new log

[Steve @ BMS/Fuel-It!]

Turbo is pretty well maxed out up top...typical for a stock turbo. Otherwise it looks pretty normal. Could use some better fuel/more octane but it's not too bad.

[Bmw5150]

Oh ok glad to hear it looks normal here is a log with E35 according to my jb4 virtual reading on map 5 I know the file name says 4. But I did change to map 5 then disconnected the jb4 mobile app and connected then did pull

[Steve @ BMS/Fuel-It!]

I'd suggest picking up a flex fuel kit for a real ethanol reading. You can make that read anything you want and you have fairly high trims so you need to be consistent and know what you are running.

Log looks pretty normal, a little underboost but your WGDC is getting pretty high and FF is pretty high.

[Bmw5150]

Sorrt for the delay been dealing with lots of other issues

Ok I've been trying to hold back from having to use E85.
do you recomend I change the trims some how?

Also should I change the WGDC and FF?

I feel like my issue has other problems I'm also dealing with
I have a small leak on the top of my radiator
and took the air intake hoses and vrsf FMIC off to address it but feel like a stock pipe going to my turbo is worn out cause now I seem to have a boost leak and I'm thinking it there.
throwing code 2906 repeatedly with WOT
here is the log from today it's not proper but it's all I can do with the roads being wet

[Steve @ BMS/Fuel-It!]

Please wait to do logs when it's better conditions and do them form 2k rpms to redline...those are pretty short pulls. JB4 map 5 can't really adapt with those and they aren't good for analysis.

[Bmw5150]

Road was better than expected here is a log

[Steve @ BMS/Fuel-It!]

You have multiple timing corrects so unless you get better fuel, your boost target will drop as map 5 adapts over time.

[Bmw5150]

Oh ok thank you
I've been using shell and Chevron 91 but I'm I'm Ca so it's the best I can get I guess I need to use E85.
Do I need better fuel because I'm using map 5? Or is it because I'm pushing the car beyond stock?
I'll do another log with e85 when car has room in tank
I'm also using 2 step colder plugs not sure if that has an effect

[Steve @ BMS/Fuel-It!]

I'd start by adding 3 or 43 gallons of E85 to a full tank of 91, then take a log on map 5.

To run more boost, you need more octane. You shouldn't be running 2 step colder plugs on 91 fuel. What are they gaped to?

[Bmw5150]

I put 4 gallons of e85 on half tank then filled with 91. Here is a log after 35 miles

[Steve @ BMS/Fuel-It!]

Looks good, I'd stick with that ethanol percentage. Trims are fine, AFR's and timing is good, but your turbo is pretty well maxed out now.

[Bmw5150]

Good to hear thank you for your insight.
I'll keep that percentage going
However car feels sluggish compared to months before in all maps the over and under target gauge on the app and hijack oil gauge shows inconsistently under target took a few trips to trigger error code 2906 then did 3 times today couldn't take a proper log with error code car was too cold and not enough road here is the log with it throwing 2906

[Bmw5150]

Here is another log of the engine light coming on while getting on freeway

[Steve @ BMS/Fuel-It!]

What was the code description?

When you do a decent pull, I don't really see an issue.

[Bmw5150]

ntake plenum: Suspicion of leaks between exhaust turbocharger and intake valves

[Steve @ BMS/Fuel-It!]

Haven't ever heard of that one...don't really have any input for you.

Log looks pretty normal so I don't suspect a boost leak but that description doesn't really sound like a boost leak either.

[Bmw5150]

The code is 2906 most results from Google shows it's the charge pipe being bad but mine is all metal maybe it's on the other side of the fmic near the turbo seems to be inconsistent not sure where else to check

[Bmw5150]

I took all my air hoses off didn't find any damage but did find 1 or 2 v clamps a little loose. Tighten everything and put back together ran car for about 6 30 min trips pushed it hard and light couldn't get any codes so hopefully it stays that way here is a log

[Steve @ BMS/Fuel-It!]

FF is still pretty high and WGDC is about maxed out. I'd set all of your DB's below 4500rpms to 50 to get a bit more boost down low. Up top, you've about maxed out the turbo so unless you do have a boost leak, there won't be much left in it.

[Bmw5150]

Ok thank you
I changed my duty bias to what you said I definitely noticed improvement but now I'm being kicked to map 4 going over safety I'm maxed out to 21PSI but still get thrown to map 4 from map 5 and map 2

[Steve @ BMS/Fuel-It!]

Dang...this really seems like you have something else going on and based on that log and settings, it does appear like a boost leak or something of that nature.

You can lower the DB's where you're overboosting but you shouldn't need DB's as high as 100 and FF still be up at 120.

[Bmw5150]

Ok
I'm assuming duty bias on the app is half?
I reduced it on the high end then the lower. I don't change my FF what setting do you reccomend?
after I changed the db. It threw more codes then I changed the more from 2k to 4k then I did a log but didn't throw any codes but did put me in map4 for over boost

[Steve @ BMS/Fuel-It!]

"I'm assuming duty bias on the app is half?"

I have no idea what that means.

As to your log...adaptions will take place. Your last pull looks fine and you have pretty much maxed out your turbo so you will not be able to hit that boost target up top.

[Bmw5150]

I don't know what duty bias does. I just realize my thinking was completely off about it.

I think something else is wrong too. setting menu 4/2 to 4/4 gives almost no boost and 4/3 with map 4 I hit over 15 boost

I also did another pull with 4/2 map 5 phone app reads about 3 lbs under target.

On a side note is it normal to see about .7 to .9 boost with no throttle or is that adjustable?

[Steve @ BMS/Fuel-It!]

Menu 4 needs to be set to what your running...flash (4/2), no flash (4/3), or Flash only (4/4).

As I said, your turbo is pretty well maxed out, you will not be able to hold the requested boost up top.

[Bmw5150]

What I meant is do you need to reflash every time you switch 4/2 and 4/3 or does it automatically switch it.

[Steve @ BMS/Fuel-It!]

If you're asking if toggling between 4/2 and 4/3 will change the flash...the answer is no, you would have to load the correct flash. You're telling the JB4 what flash you are running.

[Bmw5150]

Ah ok that makes sense
I'm going to try to reflash to stock to see if that stops the over boost

[Bmw5150]

My JB4 mobile app updated and I can not upload logs it seems that file is too large
any suggestions?

[Steve @ BMS/Fuel-It!]

Yes, use the auto logging feature and take shorter logs.

[Bmw5150]

Thank you
here is a log with a map 4 pull and map 5 pull
I didn't change any settings but
I did replace a turbo inlet elbow pipe. I think the boost leak is gone. My hijacked oil temp is set to O/U boost target seems pretty stable the new app doesn't seem to have a display for it anymore