[Sgop335]

Originally Posted by RSL

+1 that gas isn't great or the tune needs work for it. Despite the name, boost target is not a target, it's a limit. Boost somewhat below boost target isn't a problem unless WGDC is high at the same time, which may indicate a leak.

Lol, its not a limit. It is a target or set point. The whole pid theory is based on that

[RSL]

Originally Posted by Sgop335

Lol, its not a limit. It is a target or set point. The whole pid theory is based on that

That's exactly right, it's a reference point for PID to know what the error is and which way, but DME nannies for anything over, it unless they're tuned out. In that sense, it's a limit No one tunes PID for 20psi and then sets target for 15psi for a reason lol

[Sgop335]

Originally Posted by RSL

That's exactly right, it's a reference point for PID to know what the error is and which way, but DME nannies for anything over, it unless they're tuned out. In that sense, it's a limit No one tunes PID for 20psi and then sets target for 15psi for a reason lol

O in that sense its a limit, got it lol, keep saying

[RSL]

Originally Posted by Sgop335

O in that sense its a limit, got it lol, keep saying

Maybe a more digestible way to look at it is that you can run 17.5psi at a 19psi target all day long, but you can't run 19psi on a 17.5psi target without safeties acting on top of PID

[sharma10]

Hey guys

Not gonna lie I'm not 100% sure what I'm looking at. I think what I'm seeing on my logs is ok and no major issues but just wondering if yall can take a look. Runs smooth without any issues so far. Thanks in advance

https://datazap.me/u/sharma10/log-15...23-24-25-27-28

[335e92tx]

Originally Posted by sharma10

Hey guys

Not gonna lie I'm not 100% sure what I'm looking at. I think what I'm seeing on my logs is ok and no major issues but just wondering if yall can take a look. Runs smooth without any issues so far. Thanks in advance

https://datazap.me/u/sharma10/log-15...23-24-25-27-28

ambient air pressure shows as 14.3. you approaching 800' elevation?
Kind of lean for an E map. And trims arnt adding fuel.
Timing looks ok.. but there isnt really any data for 4th gear above 4800.. need that to see what might be happening up high..

Boost is not bad but really close to target for a OTS map.
Looks pretty good but need 5000+ log and you will likely need some tuning to make much more power.

[johnscales]

Just gone FBO after building towards it over the years (dci, downpipes, intercooler, fmic). Did a diy valve clean (awesome), changed all coils and am running 1 step colder spark plugs (.22 gapped).
Can someone take a look at this log and let me know if the car is performing ok. It's at >93,000 miles now. Running 93 octane /97 RON.

https://datazap.me/u/johnscales/log-...og=0&data=3-23

Thanks

[335e92tx]

Originally Posted by johnscales

Just gone FBO after building towards it over the years (dci, downpipes, intercooler, fmic). Did a diy valve clean (awesome), changed all coils and am running 1 step colder spark plugs (.22 gapped).
Can someone take a look at this log and let me know if the car is performing ok. It's at >93,000 miles now. Running 93 octane /97 RON.

https://datazap.me/u/johnscales/log-...og=0&data=3-23

Thanks

it looks pretty good from what I see. Trims a little high pullin fuel down low but not bad (its kinda at the edge of being lean there so thats where someone that could tune could fix a little of both - but not really prob worth worrying about). Temps a little on the low side.. Id like to see oil closer to 210 personally. I get the impression ambient air was pretty cool there bc you are close to boost and load targets. Not much else left in that OTS map really... should be pretty speedy..

ONly suggestion is try to get a shift in there. Like going from 3rd at 2500 to 4th at 6000. That lets you see other things that might happen in the dme when it has to deal with the load change of the shift. That is where a custom tune will also return to full power SOONER post shift.

[Christian87n]

https://datazap.me/u/christian87n/st...og=0&data=3-21
First log is a stage 0 pull from a stop/creep with the default parameters set.

https://datazap.me/u/christian87n/st...og=0&data=3-20
Second log is a few minutes later with cylinder timing selected on all cylinders.

My first post had several parameters missing. Trying to make sure the engine is healthy before getting a custom tune. Car is a 335is with DCT, Engine has 63500 miles, running VRSF dp, TFT inlet and charge pipe and Wagner Comp 2 intercooler. Will be getting spark plugs, and either BL or PR coils soon, and walnut blast.

[johnscales]

Thanks 335e92tx. Can't quite remember ambient temps and you're right about the operating temp. I did the pull before the engine reached it (like 10 - 15 mins in to my drive as it was getting there). Shed load of traffic most of the time and then the opportunity to do a pull just presented itself so I took it. Will drive around for longer before I do my next log for sure.
Good to know that the car is healthy for it's age. I've owned it from just over 54000 miles (from BMW approved used) and she's never been more than 6 - 7000 miles between oil changes. History of failures in five years is good. One Injector changed at ~63000 shortly after introducing JB4. Water pump changed at ~ 89000 miles. I actually think it went out early because I was topping up when coolant got low with straight bmw coolant because the SA said that it was premixed but learned later that it's not. Doh! I had got through about a bottle and a half of that stuff (3 litres) over the years so my dilution will have been too rich=higher running temps methinks.
Other than that I don't know how there's so much scare mongering with talk about having a ton of failures with this engine but maybe i've just been lucky.
The car hasn't seen a dealership in 4 years. BMW tried to charge me £1800 to change all six injectors after telling me that only one was leaking but wouldn't tell me which one. I then discovered INPA which did the honors on that one Changed it out and the rest have been fine through DCI's and downpipes (3 more years of driving) and finally FMIC. I had a small stutter on start up about 6 months ago I smelled a bit of fuel and pulled my spark plugs to find that one was a little damp with petrol and changed a second injector immediately. Everything has been mint since then.
Biggest differences in order of them happening.
1) jb4 - Faster car with strange lack of consistency. Loved the in flight controls BUT... JB4 one day decided to f*** up and car wouldn't start with it plugged in any more. These were frustrating times and I missed the power for months)
2) Downpies - Faster car again. Near instant throttle response.
3) MHD Smoother faster car consistently.
4) DIY valve clean. This was like "Hello sir, here is your new faster car"
5) FMIC + MHD stage 2+. This was like "Hello sir here is your 997 turbo" (Track drove one of these and it's the most similar drive acceleration wise that I've experienced. ((NB. It's not by any means meant to be an out and out comparison to the porsche so don't burn me)).
Finally. I have to say that thanks to this and a.n.other forum I have learned so much about the N54 335i. Without these I would never have picked up the knowledge of my car over my 5 years of ownership which I now have and would likely have traded the car in a couple of years ago. Instead she is now a keeper and I hope to do one last hurrarh soon, WMI.... although that's probably what a lot of people say before going hybrid/single turbo.
Long may this forum, this thread and the other one run on.

[335e92tx]

Originally Posted by Christian87n

https://datazap.me/u/christian87n/st...og=0&data=3-21
First log is a stage 0 pull from a stop/creep with the default parameters set.

https://datazap.me/u/christian87n/st...og=0&data=3-20
Second log is a few minutes later with cylinder timing selected on all cylinders.

My first post had several parameters missing. Trying to make sure the engine is healthy before getting a custom tune. Car is a 335is with DCT, Engine has 63500 miles, running VRSF dp, TFT inlet and charge pipe and Wagner Comp 2 intercooler. Will be getting spark plugs, and either BL or PR coils soon, and walnut blast.

Nothing really surprising on the IS map. Tming looks ok.. Looks like it hits overboost at about 4300. Ambient air is kind of low - 14.1. So you over 1K feet elevation?

Trims are a little high. And its a little lean. Any of the OTS maps will bring those down tighter.
You are getting quite a bit of throttle closure but not thats not surprising for the factory map. I think you will likly need a custom tune bc of the 14.1 psi if nothing else... thats gonna require some work for scalers prob and also WGs.

[sharma10]

Originally Posted by 335e92tx

ambient air pressure shows as 14.3. you approaching 800' elevation?
Kind of lean for an E map. And trims arnt adding fuel.
Timing looks ok.. but there isnt really any data for 4th gear above 4800.. need that to see what might be happening up high..

Boost is not bad but really close to target for a OTS map.
Looks pretty good but need 5000+ log and you will likely need some tuning to make much more power.

Thanks for the help. Yah I'm about 700ft above see level here. I was always wondering if I had a fueling issue but I had the stage 2 LPFP upgrade and replaced my HPFP. I'm just hoping I can get some longevity out of this car since it's my DD.

Is there anyway to predict any potential issues prior to upgrading turbos? Was thinking Pure stage 2 next summer but am worried it'll unearth a whole host of problems (main concern being injectors and clutch slip)

I'll try to get a full RPM log up soon. Any recs on remote tuners?

[Christian87n]

Originally Posted by 335e92tx

Nothing really surprising on the IS map. Tming looks ok.. Looks like it hits overboost at about 4300. Ambient air is kind of low - 14.1. So you over 1K feet elevation?

Trims are a little high. And its a little lean. Any of the OTS maps will bring those down tighter.
You are getting quite a bit of throttle closure but not thats not surprising for the factory map. I think you will likly need a custom tune bc of the 14.1 psi if nothing else... thats gonna require some work for scalers prob and also WGs.

Yeah, right around 1k in elevation. I appreciate the look at my logs. Thanks!

[335e92tx]

Originally Posted by Christian87n

Yeah, right around 1k in elevation. I appreciate the look at my logs. Thanks!

a custom will also help with DCT during shifts. You might want to get in on the V8 wedge beta testing (http://www.e90post.com/forums/showpo...ostcount=10260) but the ambient air wont make you really a ideal gunny-pig...

[335e92tx]

Originally Posted by sharma10

Thanks for the help. Yah I'm about 700ft above see level here. I was always wondering if I had a fueling issue but I had the stage 2 LPFP upgrade and replaced my HPFP. I'm just hoping I can get some longevity out of this car since it's my DD.

Is there anyway to predict any potential issues prior to upgrading turbos? Was thinking Pure stage 2 next summer but am worried it'll unearth a whole host of problems (main concern being injectors and clutch slip)

I'll try to get a full RPM log up soon. Any recs on remote tuners?

if you are a DCT you really need to go custom tune now. At least one or two will still give you options (maybe just pay an extra 100) when you go to hybrids and all kinds of work will be needed.

As far as etunes go let's just say it's complicated. ;-) And you got pm..

[McLeanSC]

Originally Posted by Sgop335

Dunno wtf earlier guy was saying but, your log looks good. Is it normal, no, but you are running 99 and it is great to have no corrections!
Only small thing to point out afrs dont climb to 235 as cleanly as they could. Lot of throttle closures normal for stock map, each time boost exceeds target. The timing is nice and strong. Whats the code?

Originally Posted by 335e92tx

Ah, it looks like any other factory log. They dont DO TIMING CORRECTIONS bc they arn't at load limits the same way (at least no log I have seen). So it really wont be to definitive until it gets more load. And Load reqests and load actual should be logged to get any real idea what might have been exceeded any why throttle closer occured.


Location Scotland - 99 RON is the same as 93 in the US ((R+M)/2)=ANTI KNOCK INDEX

Lambda can be below 235 for various reasons - especially transient .. most likely is a fouled or aging O2 sensor.

But whatever, just MO.

Originally Posted by RSL

Stock bin, 7psi, equivalent of 93-94 octane, guessing somewhere around 60-65F and rowing through gears. You're not asking for much and conditions don't get much better than that. Now, if you had no corrections at constant highway speeds on a stock bin, I'd be impressed.

If an injector were leaking in some fashion, the bank wouldn't get to 235:1, would take extremely long time to do it or might hit it initially and then fall back into the 100s:1 or lower. Those initial gaps between bank AFRs like McClean's are likely a non-issue, but can certainly keep a watch on it. If there's an actual leaky injector in a bank, you really can't miss it (unless someone has burble option set, then it's dumping fuel on purpose when they'd normally be off).

Thanks a lot for the replies, I really appreciate it. The reason I posted was I have the 29E1 code, fuel mixture bank 2 and my mechanic can't find anything causing it, short of swapping out injectors/coils. I wanted to make sure the car was safe to drive with the code until I get it sorted.

335e92tx you reckon having a fouled O2 sensor could be linked to the code?

[335e92tx]

in general as O2 sensors age, they just react slower (deposits accumulate on the planer element and it causes it to need more MIXTURE (fixed) changes to vary the voltage to the DME). And I think the way the biasing works, is the airflow measurement side (speed density reference or MAF) is what provides the rich reference and is constantly trying to add fuel. The exhaust side is what tries to constantly pull fuel to get it back to verify all Oxygen has been consumed.

So, in theory, it should just run a little richer for a few ST trims before it goes back to what a new sensor would detect. I think it does that bc working the opposite way, ( with the O2s having to add fuel), would cause more drivability issues ...(lean surges). And people can live with O2s as they age (a little lower Fuel economy and maybe some slight hesitation) more than they are likely to accept progressively more lean surges.

Im pretty sure that is how most closed loop systems work in sync. So the code comes back consistently?
If the sensors have more than 60K miles Id start making them the next on the list to replace.

[McLeanSC]

Originally Posted by 335e92tx

in general as O2 sensors age, they just react slower (deposits accumulate on the planer element and it causes it to need more heat changes to vary the voltage to the DME). And I think the way the biasing works, is the airflow measurement side (speed density reference or MAF) is what provides the rich reference and is constantly trying to add fuel. The exhaust side is what tries to constantly pull fuel to get it back to verify all Oxygen has been consumed.

So, in theory, it should just run a little richer for a few ST trims before it goes back to what a new sensor would detect. I think it does that bc working the opposite way, ( with the O2s having to add fuel), would cause more drivability issues ...(lean surges). And people can live with O2s as they age (a little lower Fuel economy and maybe some slight hesitation) more than they are likely to accept progressively more lean surges.

Im pretty sure that is how most closed loop systems work in sync. So the code comes back consistently?
If the sensors have more than 60K miles Id start making them the next on the list to replace.

Cheers mate it sounds like you know your stuff ha. 90,000 miles on the sensors so I think I'll have them swapped out.

[335e92tx]

Originally Posted by McLeanSC

Cheers mate it sounds like you know your stuff ha. 90,000 miles on the sensors so I think I'll have them swapped out.

eh,, maybe just a little. No expert for full closed loop control and certainly not for Bosch DME operation with n54...
g/l
I mean there is also some stuff that happens with the three way catalyst systems that constantly bounce between just above and just below stoichiometric but that is prob more relevant to best cat operation for minimal side effects to the cat itself (and lowest possible emission) but thats really not what we are talking here ;-)

[Spyro235]

So, Small update having to do with the stumbling and low boost issues I'm having. Again, expecting my turbos to be failing, but I'm not so sure now! Found out my Intercooler, on the turbo side, had blown off and destroyed the O ring. I think I likely bought the car like this and never realized it. Replaced both sides of the intercooler's O rings, and reattatched. Then, as soon as I get on the gas, BANG BANG BANG, and the car starts misfiring like crazy. Cyl 2, I swapped the coil on lunch today, the miss followed. I'm on original bosch coils. Matt @ZNM Told me to just replace all, which was the plan anyway, and he highly recommended the Eldor units. I'm swinging by his shop after work to get them. After the car stops missing, I'll be able to actually feel what the real boost should be like. I'm on the stock map right now, but if all goes well after we swap out all 6 coils, I'll likely go stage 1 back to stage 1 later today. I'll try to put on my downpipes today too, if all else goes well. I'm so excited at the prospect of getting rid of my surging/ stumbling, and I can't believe it was the coils all along. I'll find out for sure after work, and I'm counting the minutes.

[335e92tx]

Originally Posted by Chezzy62

Please someone take a look at my 3rd-4th gear pull thanks

Eh, its pretty tough to do anything with pdf file. Best thing to do is upload it to datazap.me or save it as a csv if nothing else.

[Chezzy62]

Originally Posted by 335e92tx

Eh, its pretty tough to do anything with pdf file. Best thing to do is upload it to datazap.me or save it as a csv if nothing else.

https://datazap.me/u/chezzy62/3rd-gear-pull-1?log=0&data=3-24