[chkkx]

Hi guys. Please have a look at my logs as I don't know why there is none to little boost till 3500rpm in 4th gear. I am also a few psi below boost target in both gears and have awful gas smell. Have 2C77, 2C78, 2DED and 2BA2 codes on the car.

Gear 3: https://datazap.me/u/johanxx/after-w...ta=2-3-4-13-23

Gear 4: https://datazap.me/u/johanxx/after-w...og=0&data=3-23

Mods are TTE600, Bimmerlife coils, 0.022 gapped NGK 97506, 3mm Vacuum lines, Stepped MTC Intercooler, Turbo Inlets with RAM filters, 3" downpipes, secondary cat delete, M-Performance Exhaust, All 6 injectors are Index12 and XHP Stage 3.

Car has been maintained with 0W-40 oil recently and walnut blasting done. Please help, feels like it should make more power with the mods.

[Sgop335]

Originally Posted by Bimmer_Engineer

My boost target is varying wildly across several different stages and versions of the maps...I suspect that I have some sort of hardware issue since the variation shows up regardless of what I do with the software. I've recently changed the injectors to index 12, change to new vacuum lines, checked the charge pipe, and changed the seals on the IC...

Something is causing the boost targets to get all whacked out and then the cars goes nuts trying to follow the boost targets...could the boost solenoids be causing this?

V8 Stage 1 93 Oct

https://datazap.me/u/jgradi1/log-153...=0&data=3-5-21

V7 Stage 1 93 Oct

https://datazap.me/u/jgradi1/log-153...og=1&data=3-21

V8 Stage 1 91 Oct

https://datazap.me/u/jgradi1/log-153...=2&data=3-5-21

Thanks for any help...

Oscillating boost target is wierd. Load req is fine. Could be boost sol or waste gates not sure. How old?

[Bimmer_Engineer]

Originally Posted by Sgop335

Oscillating boost target is wierd. Load req is fine. Could be boost sol or waste gates not sure. How old?

Thanks for some feedback! I’m thinking it might be the solenoids...car has 91k miles...turbos and solenoids are original. I don’t burn a drop of oil and I don’t have Wastegate rattle so I’m hoping it’s the solenoids...

[elite.]

New to logs. No idea if I'm doing this right. Did an auto log for like 5 seconds. I'm having a lambda bank 2 issue and the cel is on and I just had both upstream sensors replaced. Car idles weird every now and again but overall runs well I think? E93 2009 with 69k. n54 stage 2+. Dp plus fmic. Any ideas guys?

https://datazap.me/u/elite/n54?log=0&data=3-24

[chkkx]

Use manual logging - 3rd gear, traction completely off, steady at 2500 rpm, start log and put your foot down till 6800rpm. Wait a little for the rpm's to go down till 6400/6300 and stop log. That way you can see what the fuel pumps are doing after WOT.

Reset all lambda settings in MHD and see if the CEL light goes off. Have the ignition off for a minimum of 30seconds. Weird idle every now and again could be coils.

[elite.]

Redid log. 2500rpm to mid 5s. Didn't have enough space, was not on expressway. Didnt stutter, felt stong, etc. Thoughts? Maybe the post car sensor is just causeing the code....idk, both precat sensors are new, Bosch. Also put new plugs in just cause. Hate codes, especially when the car does seem to run good. Gas mileage is def low though. Not sure if that's just cause I've been doing pulls though.


https://datazap.me/u/elite/log-15371...og=0&data=3-24

[DrewM.]

I'm also a complete nobbie to the world of N54 tuning, although I've had a Impreza Sti, Mazda FD3S and turbo Miata's all of which have been tuned, so I'm not new to tuning.

I installed MHD a few weeks back after doing a plug and coil refresh, today was the first opportunity to grab some logs.

As I say, I've had stage 1, 98 RON map running on my '07, 68k stock 35i for a few weeks and have been very happy with the way the car drives, no issues, nor hicups to report.

Could some of you more learned N54 gents cast an eye over the logs to see if anything is awry?

A few point I have noticed, I did not switch off the DTC so there is some erratic throttle position data but the rest looks OK to me, a few degrees of timing being pulled on a couple of the cylinders which seem to correlate to a slight weep of the VCG on those cylinders which I noticed when changing the plugs.


Whats your thoughts?

Ambient on the day was 19 degrees C, or 67 in Fahrenheit.

https://datazap.me/u/drewm/log-15371...data=3-4-14-21

https://datazap.me/u/drewm/log-15371...og=0&data=3-21

[GODDSPD]

Originally Posted by RSL

Adder/ceiling is applied to base only. WGDC Limit should be the limit for WGDC after PID, but even the stock limit is higher than what's on that log. Wonder if it also acts a final "emergency" limit if things are too far out of range. Max WG PWM range is set to 100% in the roms, but stock WGDC Limit is 57%, which is what his final WGDC happens to be. That may just be coincidence, but either way, the boost control is obviously jacked up, elevation or not.

What's your WGDC Limit set to GODDSPD?

I’ve been trying to figure this out outside of the forums with no luck. Wgdc limit has been set anywhere from 57-85 with no change. I tried boost setpoint by rpm tuning but still did not respond to base and still had the limit at 40.2 for wgdc after PID.

I’ve tried exact maps that work fine on other cars just to watch duty cycles and no change. I’m leaning toward hardware at this point.

[DrewM.]

Originally Posted by DrewM.

I'm also a complete nobbie to the world of N54 tuning, although I've had a Impreza Sti, Mazda FD3S and turbo Miata's all of which have been tuned, so I'm not new to tuning.

I installed MHD a few weeks back after doing a plug and coil refresh, today was the first opportunity to grab some logs.

As I say, I've had stage 1, 98 RON map running on my '07, 68k stock 35i for a few weeks and have been very happy with the way the car drives, no issues, nor hicups to report.

Could some of you more learned N54 gents cast an eye over the logs to see if anything is awry?

A few point I have noticed, I did not switch off the DTC so there is some erratic throttle position data but the rest looks OK to me, a few degrees of timing being pulled on a couple of the cylinders which seem to correlate to a slight weep of the VCG on those cylinders which I noticed when changing the plugs.


Whats your thoughts?

Ambient on the day was 19 degrees C, or 67 in Fahrenheit.

https://datazap.me/u/drewm/log-15371...data=3-4-14-21

https://datazap.me/u/drewm/log-15371...og=0&data=3-21

Anyone care to comment?

[joshe92]

How much improvement (HP and Tq gain) is a N55 FBO custom map over the Stage 2+ on MHD? I know all cars are different (parts, temp., car weight) but is there a negligible difference between the 2+ and a custom tune?

[Bimmer_Engineer]

Originally Posted by DrewM.

Anyone care to comment?

There’s some info on interpreting logs here...

https://www.e90post.com/forums/showt...t=interpreting

Based on what I know to look at it looks pretty good except for the intake air temps...you could benefit from an upgraded intercooler. This might help with the timing corrections you’re getting too...

[DrewM.]

Originally Posted by Bimmer_Engineer

There’s some info on interpreting logs here...

https://www.e90post.com/forums/showt...t=interpreting

Based on what I know to look at it looks pretty good except for the intake air temps...you could benefit from an upgraded intercooler. This might help with the timing corrections you’re getting too...

Thanks for the link, some interesting information.

I was also a little surprised how quickly the IAT's rise during a single 2K - 7K run.

I had also sent the logs to MHD for review, they also commented that the IAT were a little on the high side, and, the standard IC was the biggest bottleneck on a stage 1 N54.

I'm about to place an order for a new CP and new divert/BOV solution, I now think I'll be adding a Phoenix 5" IC to that list.

[Turbo Seabass]

https://datazap.me/u/turbo-seabass/s...og=0&data=3-24

Target is off by around 1 psi. I got a check engine light at the end of the run, which happens whenever i'm at high load/high rpm at 3rd gear. Vacuum lines have been replaced so i'm thinking it's either a leak in the charge pipe or boost solenoids. Also forgot to turn off dtc.

Any ideas?

[NoGuru]

Originally Posted by Turbo Seabass

https://datazap.me/u/turbo-seabass/s...og=0&data=3-24

Target is off by around 1 psi. I got a check engine light at the end of the run, which happens whenever i'm at high load/high rpm at 3rd gear. Vacuum lines have been replaced so i'm thinking it's either a leak in the charge pipe or boost solenoids. Also forgot to turn off dtc.

Any ideas?

Target and boost are close enough. You have a lot of corrections though.
Age of Plugs and coils?

[Bimmer_Engineer]

Originally Posted by Bimmer_Engineer

Thanks for some feedback! I’m thinking it might be the solenoids...car has 91k miles...turbos and solenoids are original. I don’t burn a drop of oil and I don’t have Wastegate rattle so I’m hoping it’s the solenoids...

Okay so I replaced the boost solenoids and that seems to have fixed the issues I was having with boost target oscillations as well as underboost. I'm hitting target now and the car pulls strong but now I'm getting so throttle closures that I don't understand...any insight on this???

https://datazap.me/u/jgradi1/log-153...18-19-22-25-30

[Sgop335]

Originally Posted by Bimmer_Engineer

Okay so I replaced the boost solenoids and that seems to have fixed the issues I was having with boost target oscillations as well as underboost. I'm hitting target now and the car pulls strong but now I'm getting so throttle closures that I don't understand...any insight on this???

https://datazap.me/u/jgradi1/log-153...18-19-22-25-30

You are overboosting. Look at boost mean.

[Bimmer_Engineer]

Originally Posted by Sgop335

You are overboosting. Look at boost mean.

Thanks a bunch...i don’t usually look at boost mean...



Should I reset my adaptations since I changed my boost solenoids? If so which ones? Throttle or load control perhaps?

[mang.vang]

Went to the drag strip last night hoping for a better time slip. Noticed my load is always at least 10 values under target. Here are my logs from the runs if it is able to tell where my issues are. It was a hot day which explains why my IATs were high (heat soak).

https://datazap.me/u/mangvang/14-log...19-20-23-24-25

[Turbo Seabass]

Originally Posted by NoGuru

Target and boost are close enough. You have a lot of corrections though.
Age of Plugs and coils?

The funny thing is plugs and coils are both pretty much brand new. I suspect the plugs might not be of the best quality, which I bought from BMS. Do you buy your plugs straight from the BMW dealership or do you go for 1 step colder?

[Linx]

I was running MHD map 1+ with fmic,dci, and upgraded chargepipe and bov. The car felt like it ran pretty strong. Just recently did dp's and map 2+. The car doesn't feel much faster and actually feels like it lost some power. I did some 3rd gear pulls today and see a jagged boost graph when its building boost. I'm not that knowledgeable with WGDC but doesn't seem to be a smooth line either. Can someone look at my logs and tell me what you see?

https://datazap.me/u/linx/1st-pull?log=0&data=3-23
https://datazap.me/u/linx/2nd-pull?log=0&data=3-23

Occasionally when I go med to hard throttle the boost doesn't feel like it's kicking in. Here's a log of that

https://datazap.me/u/linx/boost-leak?log=0&data=3-23

[Sgop335]

Originally Posted by Linx

I was running MHD map 1+ with fmic,dci, and upgraded chargepipe and bov. The car felt like it ran pretty strong. Just recently did dp's and map 2+. The car doesn't feel much faster and actually feels like it lost some power. I did some 3rd gear pulls today and see a jagged boost graph when its building boost. I'm not that knowledgeable with WGDC but doesn't seem to be a smooth line either. Can someone look at my logs and tell me what you see?

https://datazap.me/u/linx/1st-pull?log=0&data=3-23
https://datazap.me/u/linx/2nd-pull?log=0&data=3-23

Occasionally when I go med to hard throttle the boost doesn't feel like it's kicking in. Here's a log of that

https://datazap.me/u/linx/boost-leak?log=0&data=3-23

There are way too many timing corrections, reducing power.

[Linx]

Originally Posted by Sgop335

There are way too many timing corrections, reducing power.

So is that saying I need a custom tune and this is not a hardware issue?