[BM3Rrrr]

Originally Posted by GovernUrMental

Can't view log. Running burble tune? Not sure but it could be why your seeing the afr's not shutting off quick

Sorry, had it set to private. Should work now
Burble is turned off

https://datazap.me/u/mfdoom/log-1573...og=0&data=3-22

[dpaul]

Originally Posted by BM3Rrrr

I don't normally post logs as I try to do my own research when assessing them but I cant seem to find an answer to my question.

Looking at the log you'll notice once lifting of the throttle my AFR's don't both shoot up to 234, bank 1 seems to lag behind a bit. From what I have read it could be a leaking injector but I just replaced all 6 with new index 12's a few weeks ago. I cant see a brand new injector leaking already..

Another thing is mid RPM there is a slight drop in timing cyl 1 *crk from 4.9 to 1.5 then it trends back up eventually. Is this something I should be concerned about?

And before you say it, yes I need a better FMIC...my current one just isn't keeping my IAT's down enough.

https://datazap.me/u/mfdoom/log-1573...=2-15-16-22-26

One of the new injectors could be lazy - it has happened. What prompted you to replace the injectors in the first place? Where you seeing this same problem in your logs before you replaced them? What are your mods?

[BM3Rrrr]

Originally Posted by dpaul

One of the new injectors could be lazy - it has happened. What prompted you to replace the injectors in the first place? Where you seeing this same problem in your logs before you replaced them? What are your mods?

Yes about the same as before, as well I was getting lean conditions (+34 pegged) under WOT in both banks.
I replaced everything I could trying to solve the issue. The last thing I replaced was the injectors and it fixed it.
I might try to fire up INPA and see if I can tell which injector in Bank 1 is the culprit

Mods are: FMIC, DP, DCI

[Dr777]

Originally Posted by GovernUrMental

Looks good. Second log has a bit more knock due to higher iat getting to around 150f. I'd probably just run the stage 1, not the stage 1+fmic

Low pressure fuel pump looks a bit tired up top, def keep an eye on it especially if going to stage 2, you dont want to see it go any lower than 50psi

Thanks for your advice

[dpaul]

Originally Posted by BM3Rrrr

Yes about the same as before, as well I was getting lean conditions (+34 pegged) under WOT in both banks.
I replaced everything I could trying to solve the issue. The last thing I replaced was the injectors and it fixed it.
I might try to fire up INPA and see if I can tell which injector in Bank 1 is the culprit

Mods are: FMIC, DP, DCI

Tune? Fuel? What is the "everything" you replaced trying to fix the pegged STFT? You are saying that bank 1 also previously showed the slow AFR return to 234? How old are your pre-cat O2 sensors?

You have a ton of throttle closures - some are inevitable but yours are excessive. There's also a small but consistent difference in the bank1 and 2 AFRs at WOT

[FailingToBeSmart]

Hello!

Curious to know if my boost is nominal? It's around 1-2 psi of boost target at times. Also not sure if the wgdc is an issue? Seems low from what Ive read?

https://datazap.me/u/failingtobesmar...&data=3-20

Thanks in advance! Let me know if y'all see anything.

Stage 1+ and I do have a fmic.

[BM3Rrrr]

Originally Posted by dpaul

Tune? Fuel? What is the "everything" you replaced trying to fix the pegged STFT? You are saying that bank 1 also previously showed the slow AFR return to 234? How old are your pre-cat O2 sensors?

You have a ton of throttle closures - some are inevitable but yours are excessive. There's also a small but consistent difference in the bank1 and 2 AFRs at WOT

MHD v8 stg 1+ 93. I run 7 litres of e85 every time I fill up with 98.
I replaced all vac lines, vac canisters, boost solenoids, pre-cat o2’s, injectors. I have done all this in the last 2 months.
Only after the injectors is when the trims settled down. Yes bank 1 has always been a bit slow to return to 234. Being that it’s bank specific has got me scratching my head a bit though.

I thought the throttle closures might be due to v8 maps as I understand they try to have boost match target closer then the v7 maps. I switched to v7 yesterday and will do another log and see if this is true.

The difference in AFR’s between banks is strange as well but I assume this is all related to the same issue. I wonder if it’s possible I have a small leak in a vac hose on the hot side......

[stewbets]

I'm trying to figure out why I've got really negative LTFT's at idle (-27% and -20%). Prior to purchasing the MHD Monitoring license, I was getting a mixture control code for an overly rich mixture in Bank 1. I found injector 3 to be leaking badly and replaced it. That was almost 2 weeks ago and the code hasn't come back, but my trims are still compensating for a rich condition. At idle, my MAP sensor is reporting ~15 inHg (-7.4 psi) while my mechanical boost gauge is reading ~25 inHg. Does it make sense that an inaccurate MAP sensor would be causing my trim issues. The idle is also fairly rough. Here's a log:

https://datazap.me/u/stewbets/e35-id...19-22-23-24-25

[DTOAST3]

Originally Posted by stewbets

I'm trying to figure out why I've got really negative LTFT's at idle (-27% and -20%). Prior to purchasing the MHD Monitoring license, I was getting a mixture control code for an overly rich mixture in Bank 1. I found injector 3 to be leaking badly and replaced it. That was almost 2 weeks ago and the code hasn't come back, but my trims are still compensating for a rich condition. At idle, my MAP sensor is reporting ~15 inHg (-7.4 psi) while my mechanical boost gauge is reading ~25 inHg. Does it make sense that an inaccurate MAP sensor would be causing my trim issues. The idle is also fairly rough. Here's a log:

https://datazap.me/u/stewbets/e35-id...19-22-23-24-25

How did you know your injector 3 was leaking?

[MacGuberman]

https://datazap.me/u/therealjtmcguberman/log-1573781732

Let the analysis begin!

🤓

[jpauten]

Originally Posted by MacGuberman

https://datazap.me/u/therealjtmcguberman/log-1573781732

Let the analysis begin!

🤓

You're getting major throttle closures, and you have LOTS of timing corrections (which isn't a good thing). When was the last time you replaced your spark plugs and/or coils? If you've replaced them recently, you probably need to add some meth/ethanol to run this much boost.

If you want to post another log that goes from 2k rpm to ~6k, I might be able to tell you more.

Good luck!

[dpaul]

Originally Posted by stewbets

I'm trying to figure out why I've got really negative LTFT's at idle (-27% and -20%). Prior to purchasing the MHD Monitoring license, I was getting a mixture control code for an overly rich mixture in Bank 1. I found injector 3 to be leaking badly and replaced it. That was almost 2 weeks ago and the code hasn't come back, but my trims are still compensating for a rich condition. At idle, my MAP sensor is reporting ~15 inHg (-7.4 psi) while my mechanical boost gauge is reading ~25 inHg. Does it make sense that an inaccurate MAP sensor would be causing my trim issues. The idle is also fairly rough. Here's a log:

https://datazap.me/u/stewbets/e35-id...19-22-23-24-25

Did you reset your lambda adaptations?

[stewbets]

Originally Posted by DTOAST3

How did you know your injector 3 was leaking?

I had the 29E0 fuel mixture control code for bank 1. I can't remember the P code that told me it was an overly rich condition, but I had to use a generic code reader to get that one. I pulled plugs 1-3 and plug 3 smelled like gas. And I haven't read this anywhere else, but I could hear my injector hissing. I put a straw up to my ear and put it in each of the cylinders and it was definitely coming from cylinder 3, along with a strong gas smell.

[stewbets]

Originally Posted by dpaul

Did you reset your lambda adaptations?

Yes, I did. I was hopeful that would do it, but no change. Any other suggesttions?

[dpaul]

Originally Posted by stewbets

Yes, I did. I was hopeful that would do it, but no change. Any other suggesttions?

Two things - first, I wonder if your reset was effective and I'd repeat it and relog to see if the ltft's had actually reset. I like to use INPA for this sort of thing rather than MHD.

Second, although the #3 injector might have been the obvious leaker, I wonder if the others are on their way out as well. If they are not index 11 or 12, you might want to replace them. That's expensive I know. Both banks seem to be affected but bank 1 is clearly worse so swapping injectors between banks might be a revealing experiment.

[stewbets]

Originally Posted by dpaul

Two things - first, I wonder if your reset was effective and I'd repeat it and relog to see if the ltft's had actually reset. I like to use INPA for this sort of thing rather than MHD.

Second, although the #3 injector might have been the obvious leaker, I wonder if the others are on their way out as well. If they are not index 11 or 12, you might want to replace them. That's expensive I know. Both banks seem to be affected but bank 1 is clearly worse so swapping injectors between banks might be a revealing experiment.

I can try resetting the adaptations again and logging. Not a bad idea. And the other injectors certainly could be causing this issue as well. Is my faulty MAP sensor theory ridiculous? I have no idea how they typically fail.

[dpaul]

Originally Posted by stewbets

I can try resetting the adaptations again and logging. Not a bad idea. And the other injectors certainly could be causing this issue as well. Is my faulty MAP sensor theory ridiculous? I have no idea how they typically fail.

I don't think it's likely a MAP sensor is involved. You can unplug both MAP and TMAP sensors to see if things change - the engine will still run and you can log at idle as you have been doing.

[stewbets]

The lambda reset went through for sure, but the STFT's immediately started going negative since the LTFT's were now 0. I feel like the engine was idling smoother than ever for the first 5 seconds or so before the trims started adjusting.

[dpaul]

Originally Posted by stewbets

The lambda reset went through for sure, but the STFT's immediately started going negative since the LTFT's were now 0. I feel like the engine was idling smoother than ever for the first 5 seconds or so before the trims started adjusting.

So if you make a standard log (WOT, 2500 to 6K rpm), what do your trims and AFRs look like? Is this only a problem at idle?

[stewbets]

Originally Posted by dpaul

So if you make a standard log (WOT, 2500 to 6K rpm), what do your trims and AFRs look like? Is this only a problem at idle?

The problem appears to be way less pronounced at higher rpm's, at least. Analyzing logs is brand new to me, so I'm not sure how close to 0 is normal throughout the rpm and load range. But here's a 3rd gear pull:

https://datazap.me/u/stewbets/pull-1...18-19-22-23-24

And here's a 4th gear pull a couple days later (traffic has made these logs less than ideal):

https://datazap.me/u/stewbets/4th-ge...-23-24&mark=66

[dpaul]

Originally Posted by stewbets

The problem appears to be way less pronounced at higher rpm's, at least. Analyzing logs is brand new to me, so I'm not sure how close to 0 is normal throughout the rpm and load range. But here's a 3rd gear pull:

https://datazap.me/u/stewbets/pull-1...18-19-22-23-24

And here's a 4th gear pull a couple days later (traffic has made these logs less than ideal):

https://datazap.me/u/stewbets/4th-ge...-23-24&mark=66

Damned if I can see anything wrong with these

[MacGuberman]

Originally Posted by jpauten

You're getting major throttle closures, and you have LOTS of timing corrections (which isn't a good thing). When was the last time you replaced your spark plugs and/or coils? If you've replaced them recently, you probably need to add some meth/ethanol to run this much boost.

If you want to post another log that goes from 2k rpm to ~6k, I might be able to tell you more.

Good luck!

I appreciate the response.

Almost new coils and plugs. 109k miles. I'll try to get some more logs pulled. Are the timing corrections due to octane?

Edit: found the timing corrections thread. Thanks for pointing that out.