[RSL]

Originally Posted by ryders

https://datazap.me/u/ryders/e30-stag...og=0&data=3-24

I just flashed E30 Stage 1 V8.0. I'm a little worried my STFT goes too far negative. Other than that let me know what you see. The STFT starts out negative so I think I may have too much ethanol in my blend?

Any suggestions are appreciated!

I guess there's a 12psi E30 map. Negative trims are pulling fuel, means you have room for more E85, at least as far as 1 log shows. Max on the trims is +/- 34%, so there's room. Stock FMIC?

Originally Posted by tan_rich

I see, i havent poured e85 in 2 tanks and i did a reset adaptations right after. Did not measure content of but i poured 2 gallons and the rest was 91. Well see how it goes with the new o2 sensor.

Hmm. Did you just do the lambda resets or everything? Not holding my breath on the O2 sensor fixing it since both trims a off in other spots, I wouldn't drop money on one just yet.

Your trims were high, but together on actual WOT pulls before. The part-throttle stuff may be adding more to the mix with the trim separation. Have you done a WOT log since the reset/pump gas? This one from a week ago at least shows the trims together:

https://datazap.me/u/tanrich/log-151...20-21-24-25-26

You still have an issue there, but it's not bank to bank, which changes things away from O2s...

[tan_rich]

Originally Posted by RSL

I guess there's a 12psi E30 map. Negative trims are pulling fuel, means you have room for more E85, at least as far as 1 log shows. Max on the trims is +/- 34%, so there's room. Stock FMIC?

Hmm. Did you just do the lambda resets or everything? Not holding my breath on the O2 sensor fixing it since both trims a off in other spots, I wouldn't drop money on one just yet.

Your trims were high, but together on actual WOT pulls before. The part-throttle stuff may be adding more to the mix with the trim separation. Have you done a WOT log since the reset/pump gas? This one from a week ago at least shows the trims together:

https://datazap.me/u/tanrich/log-151...20-21-24-25-26

You still have an issue there, but it's not bank to bank, which changes things away from O2s...

For the adaptation reset i did Lamda sensors, Intake, Throttle, lamda regulation, fuel high pressure system. I believe this log was right after or the day of when i did the adaptation resets.
And to correct the previous post, i did the adaptation reset the tank on the 91 only tank after the e85 mixture.

I was also thinking to maybe just swap the secondary o2 sensors to see if that fixes everything however I saw how the wire coming from the car itself is different length and they are where they should be. I'll inspect the wires tomorrow to make sure there are not cut or anything to the top of engine bay. And too late on ordering the one sensor lol since I needed a few extra stuff as well, worse case is I sell it to someone or keep for spare.

What if the possibility of the issue being injector related? My car is still fairly low miles(67k) and new(2013). Maybe i should pull a plug and see how it is. Though The weird thing with this issue is it came up after downpipe install and everything else prior was fine for a year. So the problem has to or should lie with the o2 sensors or downpipes itself.
Another thing to note was I got the o2 sensors replaced by dealer a week or two before I did the downpipes and they seem to running fine then.

[RSL]

Originally Posted by tan_rich

For the adaptation reset i did Lamda sensors, Intake, Throttle, lamda regulation, fuel high pressure system. I believe this log was right after or the day of when i did the adaptation resets.
And to correct the previous post, i did the adaptation reset the tank on the 91 only tank after the e85 mixture.

I was also thinking to maybe just swap the secondary o2 sensors to see if that fixes everything however I saw how the wire coming from the car itself is different length and they are where they should be. I'll inspect the wires tomorrow to make sure there are not cut or anything to the top of engine bay. And too late on ordering the one sensor lol since I needed a few extra stuff as well, worse case is I sell it to someone or keep for spare.

What if the possibility of the issue being injector related? My car is still fairly low miles(67k) and new(2013). Maybe i should pull a plug and see how it is. Though The weird thing with this issue is it came up after downpipe install and everything else prior was fine for a year. So the problem has to or should lie with the o2 sensors or downpipes itself.
Another thing to note was I got the o2 sensors replaced by dealer a week or two before I did the downpipes and they seem to running fine then.

Take away the bank-to-bank deviations that the latest part-throttle logs show and it becomes very basic. Something is effecting the entire motor (which all the logs show regardless of the last). Injectors and O2s would effect bank to bank primarily, so I'd step back and look at the larger picture: sputtering wasn't fixed and something is effecting fuel trims. May be one thing effecting both or could be totally separate issues, but start with the largest/most obvious problem first: the sputtering. If there were issues with the CPS or that replacing it "kind of" helped, but didn't resolve it, might be a good place to start from.

You could post in the main section and ask for more ideas on the sputtering issue. Just throwing money at parts and hoping it resolves something gets expensive quickly. It might be cheaper and faster to pay someone to concretely diagnose the problem(s) if you have to...

[Sgop335]

Originally Posted by tan_rich

For the adaptation reset i did Lamda sensors, Intake, Throttle, lamda regulation, fuel high pressure system. I believe this log was right after or the day of when i did the adaptation resets.
And to correct the previous post, i did the adaptation has.

In the older mhds there used to be a fuel-air adaptation. That used to bring long terms to 0. Dont know what it is called now. Check. Would like to know as well. Is it mass air? Buts thats the adaptation needed.

[ryders]

Originally Posted by RSL

I guess there's a 12psi E30 map. Negative trims are pulling fuel, means you have room for more E85, at least as far as 1 log shows. Max on the trims is +/- 34%, so there's room. Stock FMIC?

Yeah, MHD added e30 and e50 tunes for stage 1, and stage 1+ In the latest update v8.0. I’m running stock FMIC. Thanks for the note on adding ethanol, glad I didn’t make it worse by running more 93.

[guop]

Originally Posted by RSL

EMP pro tune? Couldn't help it Don't use a BEF as a primary flash only. In addition to other things, boost control isn't tuned because it isn't used with a JB4. Boost is running only 50-75% of target and load follows suit well below target. You have some large timing corrections after the shift.

If you're tweaking this yourself and plan to be flash only, best bet is always to start with a copy of your original bin and tune that.

No haha it’s an e40 BEF. Not sure who it was from but not emp. And I normally don’t run jb4 in map 0 with the flash loaded but I wanted to see what a log would look like, also wanted to ask about why timing could have dropped in between shifts and how it could be corrected.

I’m probably going to have to use the jb4 app for logging purposes since I can’t switch maps and log with mhd. Wish I would have learned that before buying it

[tan_rich]

Originally Posted by RSL

Take away the bank-to-bank deviations that the latest part-throttle logs show and it becomes very basic. Something is effecting the entire motor (which all the logs show regardless of the last). Injectors and O2s would effect bank to bank primarily, so I'd step back and look at the larger picture: sputtering wasn't fixed and something is effecting fuel trims. May be one thing effecting both or could be totally separate issues, but start with the largest/most obvious problem first: the sputtering. If there were issues with the CPS or that replacing it "kind of" helped, but didn't resolve it, might be a good place to start from.

You could post in the main section and ask for more ideas on the sputtering issue. Just throwing money at parts and hoping it resolves something gets expensive quickly. It might be cheaper and faster to pay someone to concretely diagnose the problem(s) if you have to...

I have a sputtering issue? I dont recall that being mentioned then again it is like 5am for me lol.... Also what is the CPS?. I still have CPO warranty however i dread removing everything again...

Edit: starting the car this morning, I noticed that STFT1 is decent amount higher than STFT2.

[RSL]

Originally Posted by guop

No haha it’s an e40 BEF. Not sure who it was from but not emp. And I normally don’t run jb4 in map 0 with the flash loaded but I wanted to see what a log would look like, also wanted to ask about why timing could have dropped in between shifts and how it could be corrected.

I’m probably going to have to use the jb4 app for logging purposes since I can’t switch maps and log with mhd. Wish I would have learned that before buying it

LOL OK, at least you have a JB4 in there to use with it. Post-shift corrections could be caused by a lots of things unfortunately, but torque output is always a prime suspect.

Originally Posted by tan_rich

I have a sputtering issue? I dont recall that being mentioned then again it is like 5am for me lol.... Also what is the CPS?. I still have CPO warranty however i dread removing everything again...

Edit: starting the car this morning, I noticed that STFT1 is decent amount higher than STFT2.

Note to self: don't reply to anything after 3am Who has what history becomes a blur, but your trims track together when throttle is ~30% or 99%. 45-50% they split and might be enough velocity and blade in the way to disrupt distribution while the others avoid one or the other. You should be safe to do WOT, just keep to 4500-5000rpm and don't shift and stay in it to avoid the 0% trim AFRs.

Do what Sgpop said, I can't track what the adaptation names mean and they change. I don't reset anything often, but usually default to INPA for it. MAP sensor/intake mass would be a base variable for fueling, try resetting it too.

[tan_rich]

LOL! I feel you there, I was doing homework till 3am and I have to wake up at 5:30am for work . One thing I've noticed is that when I give it some gas my STFT are essentially flipped which I think you noticed in the previous logs. On say like 50-70% throttle, STFT1 is low at around 3-4% while STFT2 is high at 16-24%. STFT2 seems right since it should be adding fuel to accelerate and bank 1 seems to be going lean.

Another thing I noticed is when you flash a new map is that LTFT seems to reset towards 0 now in the latest revision of MHD.

I'll do a reset of all the adaptations when I leave for work and do a small log on the way to class.

[guop]

Originally Posted by RSL

LOL OK, at least you have a JB4 in there to use with it. Post-shift corrections could be caused by a lots of things unfortunately, but torque output is always a prime suspect.

Cool thanks.

Im gonna try to get better a log today on stage 1+ with jb4 in flash only mode. Not exactly what I was hoping to do but I already got the mhd monitor module so might as well make use of it : usually I run the bef and jb4 on map 2.

[335e92tx]

Originally Posted by RSL

Note to self: don't reply to anything after 3am

been there dude.

[tan_rich]

I did not do a adaptation reset yet since i left work a tad late.
Here is a various partial throttle log on my way to school. What freaked me out is my LTFT1 went really low and my STFT started to shoot high.
https://datazap.me/u/tanrich/log-151...20-21-24-25-26.
Im going to pull plugs tonight after class to see if injectors are another problem.

I get a 2E90: Mixture control and 2C31: Oxygen Sensor emission control error as well.



Going to do a reset adaptation after class.

[poptart56]

So since this is the official "look at my log" thread here's my first, just got the mhd logger.

2009 335i Sedan N54
No mods(dci on the way)
MHD Stage 1 91ACN Pump gas

https://datazap.me/u/poptart56/first...og=0&data=3-24

Was told I have a boost leak by another member but I have no idea what to look for. Logs are something new to me.

Another note, was getting a bad coil code(switched coil to be sure) and for some reason it has vanished recently

[tan_rich]

Originally Posted by poptart56

So since this is the official "look at my log" thread here's my first, just got the mhd logger.

2009 335i Sedan N54
No mods(dci on the way)
MHD Stage 1 91ACN Pump gas

https://datazap.me/u/poptart56/first...og=0&data=3-24

Was told I have a boost leak by another member but I have no idea what to look for. Logs are something new to me.

Another note, was getting a bad coil code(switched coil to be sure) and for some reason it has vanished recently

You seem to have a boost leak somewhere, typically when boost psi and boost mean psi are 1-2 off of the boost target psi at 3000-5000rpm it indicates a boost leak. You are stock so none of the intake track should be bad but check your vacuum lines to see if they are leaking or anything. Though if you have a plastic chargepipe, it may have a crack somewhere that is slowly leaking boost.

[poptart56]

Originally Posted by tan_rich

You seem to have a boost leak somewhere, typically when boost psi and boost mean psi are 1-2 off of the boost target psi at 3000-5000rpm it indicates a boost leak. You are stock so none of the intake track should be bad but check your vacuum lines to see if they are leaking or anything. Though if you have a plastic chargepipe, it may have a crack somewhere that is slowly leaking boost.

Forgive me for being daft, but where are vacuum lines on this car, I came from old Toyota's so vacuum lines and the such are kinda new to me.

When I get my dci I will definitely be checking the charge pipe for cracks. Today I was playing around with boost with the dv's unhooked and heard a strange whistle while the boost was around 12psi, couldn't repeat it.

Any chance anyone can explain a misfiring coil that suddenly stops misfiring? It just stopped doing it anymore. I have a replacement on the way.

[tan_rich]

Originally Posted by poptart56

Forgive me for being daft, but where are vacuum lines on this car, I came from old Toyota's so vacuum lines and the such are kinda new to me.

When I get my dci I will definitely be checking the charge pipe for cracks. Today I was playing around with boost with the dv's unhooked and heard a strange whistle while the boost was around 12psi, couldn't repeat it.

Any chance anyone can explain a misfiring coil that suddenly stops misfiring? It just stopped doing it anymore. I have a replacement on the way.

There are multiple vacuum lines on the n54 engine. Refer to this thread to trouble shoot the vacuum lines http://www.e90post.com/forums/showthread.php?t=1430869.

Also what do you mean by unhooked the DVs? Did you disconnect them so they would vent to atmosphere? If so you should cap the pre turbo intakes diverter inlets to prevent unwanted things from entering.

For the coils, best just to replace them. If they misfire once they prob will misfire again. It's just showing it's age.

[poptart56]

Originally Posted by tan_rich

There are multiple vacuum lines on the n54 engine. Refer to this thread to trouble shoot the vacuum lines http://www.e90post.com/forums/showthread.php?t=1430869.

Also what do you mean by unhooked the DVs? Did you disconnect them so they would vent to atmosphere? If so you should cap the pre turbo intakes diverter inlets to prevent unwanted things from entering.

For the coils, best just to replace them. If they misfire once they prob will misfire again. It's just showing it's age.

Yeah just discod them for a few pulls. I leave them hooked normally. I don't like the oil all over the place they shoot out.

Thanks for the diy about the vacuum lines I'll be checking them.

[tan_rich]

Originally Posted by poptart56

Yeah just discod them for a few pulls. I leave them hooked normally. I don't like the oil all over the place they shoot out.

Thanks for the diy about the vacuum lines I'll be checking them.

If you dislike the oil everywhere Look at getting an oil catch and PCV valve

[Sgop335]

Originally Posted by poptart56

Yeah just discod them for a few pulls. I leave them hooked normally. I don't like the oil all over the place they shoot out.

Thanks for the diy about the vacuum lines I'll be checking them.

Thats correct some oil in the ic and cp is normal during crankcase ventilation. Hence people go for an occ (i dont have one). Also as mentioned definitely vacuum lines. Boost leaks in the stock dv orings are common most dont change those. If your dv goes in too easily the orings are shot. A 24mm id 3.5mm or in my case ( not stock dv) used a 23mm id 4mm oring. Wow makes a difference.

[Chrisavick]

https://datazap.me/u/chrisavick/1-3?...23&zoom=68-117

I am pretty sure I have a boost leak but how does this log look? I had to let off a bit early on 3rd. Going to go back out tonight and hopefully get some better logs. Cars stock minus an upgraded cp

[asarang]

Hi guys, I've been looking at alot of the logs on the thread and trying to learn how to read them. I posted my log below, and from what I can see I have a boost leak and it looks like my spark plugs may need to be changed as well. Currently im running the MHD stage 1 tune stock with 91 oct on a e93 n55 335i. I have a upgraded CP and muffler delete and thats about it in terms of modifications.

https://datazap.me/u/asarang/log-151...&data=0-3-4-16

[335e92tx]

Originally Posted by Chrisavick

https://datazap.me/u/chrisavick/1-3?...23&zoom=68-117

I am pretty sure I have a boost leak but how does this log look? I had to let off a bit early on 3rd. Going to go back out tonight and hopefully get some better logs. Cars stock minus an upgraded cp

Yeah bud, not a lot there (head out to the keys to make a pull ;-) ). For one, the log started in 1st; cant infer much there other than a baseline IAT- and in the six seconds from WFO in first, it goes from 93 degrees to 136. So You need to get IATs down first or you will never make a 4th gear pull without lots of retards.

Cyl1 has quite a bit if retards. Im not sure what to make of that.


Try a roll on pull from 3rd gear and get 4th in there at least to 5000 rpm and that will tell a lot. Boost is close to target as is load in 3rd so I dont think thats an issue.


You also hit the torque limiter on the shift. Be sure and turn off dtc when logging.