[jfivesix]

Originally Posted by n55david

Gotcha

Will update though.

So far the code hasn't came back. Gonna drive around a bit more and see what's up.

Hopefully it doesn't come back… don't wanna take the whole damn belly pan off just to fix that

Read it could also just be the MAF, gonna pull it out and clean it, even if it's not, maintenance doesn't hurt!

[jfivesix]

Just to stay updated in case anyone ever runs into a similar issue.

Car is running great, building boost a lot better I can't help but to think the O rings on the boost pipe were bad already as it was very loose on the connection to the intercooler.

I went ahead and went under the car the DP connections are good.

I double checked the CP to Intercooler connections, they're good but I'm definitely thinking of upgrading the O rings on it soon.

I hadn't checked this I don't know why, but I checked the meth Bung plug and of course it spun with just my fingers. Went ahead and tightened that bad boy up and hoping the code doesn't return.

[thejeremyman9]

Originally Posted by jfivesix

Just to stay updated in case anyone ever runs into a similar issue.

Car is running great, building boost a lot better I can't help but to think the O rings on the boost pipe were bad already as it was very loose on the connection to the intercooler.

I went ahead and went under the car the DP connections are good.

I double checked the CP to Intercooler connections, they're good but I'm definitely thinking of upgrading the O rings on it soon.

I hadn't checked this I don't know why, but I checked the meth Bung plug and of course it spun with just my fingers. Went ahead and tightened that bad boy up and hoping the code doesn't return.

Orings - https://f30.bimmerpost.com/forums/sh....php?t=1659611

[jfivesix]

Originally Posted by thejeremyman9

Orings - https://f30.bimmerpost.com/forums/sh....php?t=1659611

Thank you!! Just ordered these..

I did a few logs but most suck(again)… but looking at them.. my MAF is reading 200+ lb/min??

I looked at some old logs from when I first tuned my car, and I was at about 18lb/min

I've had the same intake the entire time, only things that have changed since have been the boost pipe, turbo inlet, and the Turbosmart BOV I already had an upgraded CP/Intake.IC

Could my MAF be bad?

Getting a good log in the morning.. tired of this issue!

[jfivesix]

Got some logs .. trying to get better ones.

Code is showing 102001. If I clear it, car runs and builds boost better but it's building boost rather slow.

Cleaning the MAF as we speak

https://www.bootmod3.net/log?id=626f...0b433ba3a5073c

https://www.bootmod3.net/log?id=626f...729b4c60f21dbb

[thejeremyman9]

Can't really use those logs, there's no WOT

[jfivesix]

Originally Posted by thejeremyman9

Can't really use those logs, there's no WOT

I haven't gotten a good log yet with WOT.

But looking at it my MAF reading is at 20+lb/min at idle… that does not seem normal at all. My AFR is 14.xx

Got an alright log?
Maybe..

https://www.bootmod3.net/log?id=6271...0b43101e7d228f

[jfivesix]

Went back to stock air box and the 102001 code is gone .

Now I'm getting 108001… so my MAF is bad?

Think the 108001 was from when I disconnected it.

I'm still pushing HUGE lb/min but my AFR is so much better now

[n55david]

Your car will target around 14.7 afr at idle or cruising.. its never going to be constant, even at idle. When you're moving throttle never stays the same, or you have to go up hill vs down hill, the roads aren't even etc etc.. It will always move because it's constantly making adjustments. Thats all normal..

If you wanna replace the maf sensor, change it.

You have to post a usable log before anyone can help you.

But pretty sure you got a boost leak.. its always a damn boost leak and people will say it's not and argue and eventually they find a boost leak. A bung wasn't tight... A gasket was leaking... pipe wasn't on correctly etc

"But I don't see a leak" "but I don't hear a leak" "I checked it myself" "of course we pressure tested, all the way to 9psi and nothing".

Goodluck man, you got this!

[jfivesix]

Originally Posted by n55david

Your car will target around 14.7 afr at idle or cruising.. its never going to be constant, even at idle. When you're moving throttle never stays the same, or you have to go up hill vs down hill, the roads aren't even etc etc.. It will always move because it's constantly making adjustments. Thats all normal..

If you wanna replace the maf sensor, change it.

You have to post a usable log before anyone can help you.

But pretty sure you got a boost leak.. its always a damn boost leak and people will say it's not and argue and eventually they find a boost leak. A bung wasn't tight... A gasket was leaking... pipe wasn't on correctly etc

"But I don't see a leak" "but I don't hear a leak" "I checked it myself" "of course we pressure tested, all the way to 9psi and nothing".

Goodluck man, you got this!

Thanks man…

Would a boost leak affect my MAF readings though?

Previously I got pressure too low and those codes are gone. Now I'm getting 20+ lb/min at idle abs 100+ when pushing the throttle. My old logs show a steady 20lb/min on the throttle….

Would a leak affect those readings?

[thejeremyman9]

Originally Posted by jfivesix

Thanks man…

Would a boost leak affect my MAF readings though?

Previously I got pressure too low and those codes are gone. Now I'm getting 20+ lb/min at idle abs 100+ when pushing the throttle. My old logs show a steady 20lb/min on the throttle….

Would a leak affect those readings?

Yes, if you have a leak after the MAF, you are metering more air than is actually entering the engine. So let's say you meter 100lb/min if air, if you leak 20% of that, only 80lb/min is entering the engine... So you will have abnormally high MAF readings. There could also be a problem with the logging parameters, as 100 lb/min is WAY to high. I peak at ~340g/s which is about 45lb/min so unless you have a massive leak its just not reading correctly. Could be a software issue and not hardware, though.

[jfivesix]

Originally Posted by thejeremyman9

Yes, if you have a leak after the MAF, you are metering more air than is actually entering the engine. So let's say you meter 100lb/min if air, if you leak 20% of that, only 80lb/min is entering the engine... So you will have abnormally high MAF readings. There could also be a problem with the logging parameters, as 100 lb/min is WAY to high. I peak at ~340g/s which is about 45lb/min so unless you have a massive leak its just not reading correctly. Could be a software issue and not hardware, though.

Yeah that's what I'm thinking…

I'm on stock tune though, and I'm telling you these readings are upwards of 500lb/min which doesn't even make sense.

Gonna bite the bullet and go buy a MAF at Autozone and see if it's the sensor itself..

I actually changed to stock box and air mass too high went away, I just got this code now 108001

[thejeremyman9]

Originally Posted by jfivesix

Yeah that's what I'm thinking…

I'm on stock tune though, and I'm telling you these readings are upwards of 500lb/min which doesn't even make sense.

Gonna bite the bullet and go buy a MAF at Autozone and see if it's the sensor itself..

I actually changed to stock box and air mass too high went away, I just got this code now 108001

You are on stock tune but BM3 is still installed so any software issue with logging will still be there. Flashing stock tune is not the same as uninstalling BM3 and going back to OEM software.

[jfivesix]

Originally Posted by thejeremyman9

You are on stock tune but BM3 is still installed so any software issue with logging will still be there. Flashing stock tune is not the same as uninstalling BM3 and going back to OEM software.

Ahh I see what you mean.

Do you recommend I flash a different map?

I also noticed when I flashed back To stock, my bootmod3 app itself was outdated.

[thejeremyman9]

Originally Posted by jfivesix

Ahh I see what you mean.

Do you recommend I flash a different map?

I also noticed when I flashed back To stock, my bootmod3 app itself was outdated.

If you wanted to confirm its not a software logging issue, you would need to completely uninstall bm3 and log stock tune on stock software.

I don't think your codes are related to BM3 version, but you could try updating if you wanted...

[jfivesix]

Originally Posted by thejeremyman9

If you wanted to confirm its not a software logging issue, you would need to completely uninstall bm3 and log stock tune on stock software.

I don't think your codes are related to BM3 version, but you could try updating if you wanted...

I understand

How would I uninstall Bm3?

I had flashed stock and relocked the DME to pass CA emissions.. I was thinking of going MHD route anyway.

[jfivesix]

Originally Posted by thejeremyman9

If you wanted to confirm its not a software logging issue, you would need to completely uninstall bm3 and log stock tune on stock software.

I don't think your codes are related to BM3 version, but you could try updating if you wanted...

Jeremy, you were god damn right. It's measuring fine using a different scanner at 5g/s

[thejeremyman9]

Originally Posted by jfivesix

I understand

How would I uninstall Bm3?

I had flashed stock and relocked the DME to pass CA emissions.. I was thinking of going MHD route anyway.

Flashing back to stock and relocking DME to pass emissions will work. Just flashing stock tune keeps BM3 installed, as indicated by all those BM3 logging parameters.

[jfivesix]

Originally Posted by thejeremyman9

Flashing back to stock and relocking DME to pass emissions will work. Just flashing stock tune keeps BM3 installed, as indicated by all those BM3 logging parameters.

So I've had it uninstalled then this entire time. I had flashed and relocked to pass emissions and never flashed it again.

Using a different app and obd2 scanner my levels are normal at ~5g/s at idle and smoothly going up to 100+g/s as I push on the accelerator.

I also have no more codes which leads me to believe the air mass too high was due to the injen intake.

I'm guessing I'm good to flash back to Stage2

[jfivesix]

Guess we could close this one out.

Problem went away once I fixed the boost pipe.. could be possible I was leaking from multiple spots but now everything seems good.

[n55david]

Originally Posted by jfivesix

Guess we could close this one out.

Problem went away once I fixed the boost pipe.. could be possible I was leaking from multiple spots but now everything seems good.

Boost leak ftw

[Kevingro0478]

Originally Posted by thejeremyman9

How did you check them if not with a pressure/smoke test? Visual inspection, wiggling them, etc, doesn't really tell you anything. You could also be leaking from turbo to TIC, TIC to IC, CP meth bung plugs, either side of the CP coupler, CP to TB, CP map sensor, the vacuum line on the CP, etc.

I know this is old, but did you say “meth bung plugs”? lol