[dsocold]

Car is a 2015 bmw 640i xdrive GC.
I was running stage 1 all was good then I sent the car to the shop and got catless downpipes installed and after that ran stage 2 93 OTS and the car does not feel right anymore. I hear this Chatter almost sounds like air gushing out. Full mods are BMS intake, RVG catless downpipe, stage 2 93 mhd ots. On part throttle at times i watched my wgdc go from 40% to 80% fluctuating back and forth very fast and you can hear the engine making noise back and forth like something is wrong. I inspected the chargepipe (aftermarket) gasket is on all seems well. I got a code a few days ago P120308 I have not got it since but the car still feels down on power by 30% this is my log.
Edit: I was at the shop briefly and a boost leak doesnt seem to be my issue nor does the pcv system my valve cover was done by bmw 6 months ago. A new code showed up intermittent 101F01. I will change the boost solenoid and tmap on charge pipe. Stupid Pwg n55 shit is killing me i cant figure it out I will have to just start throwing parts at it

https://datazap.me/u/bxdinster/640i-...data=3-9-15-17

[Quick335XI]

So, after spending months figuring out fueling issues then converting over to reflex and new PI injectors, the car is running great. It feels so much more powerful than my last setup, which was methanol before my motor blew. That motor on the dyno made 604 at the wheels.

So yesterday was the big day: dyno day. We had the car it seemed all tuned in, I'd done like 10 pulls on the the tune, everything looked great. I did a couple pulls the other night, looked great. Then yesterday it got strapped down on the dyno, and it started backfiring up high and the dyn graph shows it's kind of "cutting out" up top, they said maybe it looked like ignition issues. I'm starting to wonder, if there's a difference in tuning for the street vs tuning at the dyno? Has anyone seen this issue before? It runs great pulling on the street then on the dyno it starts crapping out. The only thing I can see that's different is, during the tuning process I did all pulls in 3rd gear but the dyno was done in 4th.

I also got a superknock code a couple times, something that hasn't happened since we moved to the new fuel setup. Very frustrating. Here's a log, and I'm attaching the dyno. The thing is, the motor STILL made around 634, if it hadn't startted crapping out around 5600 who knows what it would have made... https://datazap.me/u/terryeaton/log-...og=0&data=3-20

Here is the dyno from 2019 with the previous methanol setup:



Here is the dyno from yesterday:



Does anyone know what kinds of things could cause the struggle that is starting around 5600 in the dyno? The fuel trims, rail pressure everything looks great in the log... and it seemed fine when doing pulls on the street.

Another bizarre issue is, on the dyno, there are lots of timing pulls AFTER the guy let out of the throttle... this doesn't happen on the streets either. And that's when the superknocking and backfire code happened. Under load, there are zero timing corrections... very strange.

[ray7792]

Hey,

I just replaced my HPFP with a remanufactured REIN one from FCP Euro but been having even more issues than before replacing...could someone take a glance at log below, the rail pressure is completely fucked right? Otherwise think AFR looks alright around ~14? Boost is okay?

I also replaced the fuel sensor along with the HPFP.
Do note this is on a e89 Z4, which doesn't have a low pressure fuel sensor.

Is there any possible way to tell if my LPFP and injectors are still okay? I'm highly leaning towards that the HPFP I got is just bad.

https://datazap.me/u/ray7792/08-13-2...&data=20-21-24

Log was taken on 91oct stage 1, DCI, Chargepipe with BOV.

Thank you so much for your time.

P.S. Man e89 zpost is so dead compared to this place lol

Cheers,


EDIT: replaced the REIN remanufactured hpfp with a Genuine BMW remanufactured also from fcp euro. Rail pressure looking great consistently above 2k at WOT and 700-800 idle, no codes or anything now....Suppose thats what happens when you try to save a couple hundred bucks.
https://datazap.me/u/ray7792/2022-08...data=2-3-20-21

[Spoolsport]

Hi guys

I took everyone's recommendations and did a smoke leak test. Unfortunately there wasn't enough pressure to determine if there's a boost leak but my car is now at critical levels of terrible.

https://datazap.me/u/boosty/boost-leak?log=0&data=3-22

Can someone look at my latest logs and let me know how it looks. Much appreciated guys!

[eastsidaz]

Originally Posted by Spoolsport

Hi guys

I took everyone's recommendations and did a smoke leak test. Unfortunately there wasn't enough pressure to determine if there's a boost leak but my car is now at critical levels of terrible.

https://datazap.me/u/boosty/boost-leak?log=0&data=3-22

Can someone look at my latest logs and let me know how it looks. Much appreciated guys!

Still not running well?

Just looking at your log are you doing some fancy foot work on the accelerator? Are you 100% WOT?

[Spoolsport]

Originally Posted by GovernUrMental

Still not running well?

Just looking at your log are you doing some fancy foot work on the accelerator? Are you 100% WOT?

I'll do another log tomorrow and post it. Sorry man! I believe I was WOT but could have been on rough terrain?

Still not running good. Feels like it takes 12 minutes to spool my turbos. It's getting a lot worse! Strong fuel smell from the exhaust and getting absolutely awful gas mileage.

Also something to note. I lose all boost and exhaust note will change completely when coming straight out of a hard left or right corner.

[Spoolsport]

Alright, you guys are not going to believe this. I fixed the over fueling issue by switching off MHD burble settings!!! It's literally a night and day difference.

No more surging, no more strong fuel smell and engine sounds way better. The moment I switched burble settings back on my car runs like utter crap! It literally feels like the car is choking.

This leads me to ask.... why is my car having an issue with the burble settings? Could it be O2 sensor related?

[eastsidaz]

Originally Posted by Spoolsport

Alright, you guys are not going to believe this. I fixed the over fueling issue by switching off MHD burble settings!!! It's literally a night and day difference.

No more surging, no more strong fuel smell and engine sounds way better. The moment I switched burble settings back on my car runs like utter crap! It literally feels like the car is choking.

This leads me to ask.... why is my car having an issue with the burble settings? Could it be O2 sensor related?

Glad to hear it! I remember you struggling with this issue for sometime.

Thats a strange one. What build version of MHD are you using?

[Spoolsport]

Originally Posted by GovernUrMental

Glad to hear it! I remember you struggling with this issue for sometime.

Thats a strange one. What build version of MHD are you using?

Hi mate! I've definitely fixed the fuel smell issue. However still having issues with slow spool and not hitting Boost target

My latest log. 100 % WOT

https://datazap.me/u/boosty/boost?log=0&data=3-22

How does it look? 👀

I'm using the latest version of MHD and version 7 tune

[eastsidaz]

Originally Posted by Spoolsport

Hi mate! I've definitely fixed the fuel smell issue. However still having issues with slow spool and not hitting Boost target

My latest log. 100 % WOT

https://datazap.me/u/boosty/boost?log=0&data=3-22

How does it look? ��

I'm using the latest version of MHD and version 7 tune

Doesn't look to bad tbh. WOT to boost target in 600rpm is decent.

Checked one of your earlier maps in late june https://datazap.me/u/boosty/log-1656...=0&data=3-4-22 This looks spot on to boost target in 500rpm

Could be just the maps not an issue i can see.

[Spoolsport]

Originally Posted by GovernUrMental

Doesn't look to bad tbh. WOT to boost target in 600rpm is decent.

Checked one of your earlier maps in late june https://datazap.me/u/boosty/log-1656...=0&data=3-4-22 This looks spot on to boost target in 500rpm

Could be just the maps not an issue i can see.

Thanks for the reply mate. I think I found one of main issues.

The moment I start my car it goes straight into limp mode and starts shaking

Error codes 29E1 29F1

Fuel pressure plausibility and mixture control

My hpfp gone?🥲

https://datazap.me/u/boosty/fuel-pressure-issue?log=0&data=3-22

[Dave92N54]

https://datazap.me/u/e92dave/cd919-v2?log=0&data=3-21

Just super happy with how the car is running now that everything seems to be sorted. Fresh revision and RB OEM Billets going to work

[MfknBimmerBoy]

Hello readers,

My name is Devin. I own an 07' E92 335i with 88.5k miles. Purchased the car with 59k 3 years ago and since I have put almost 30k on the car running stage 2/2+. I have run almost every 2+ map from V5 e40 to V10 ethanol/pump maps in that ~30k miles.

I just recently replaced my HPFP, HP sensor, LP sensor, plugs (1 step .22), and walnut blasted (was also done at 61k miles (25k miles ago)) because the car died and wouldn't start again while throwing HPFP and injector cutoff codes (new 12s).

I decided to start back on V7 93 octane stage 2+ map and run a log with new fuel parts installed and instead of getting injector cutoff codes and HPFP codes, I got 30FF...

Here is the V7 Stage 2+ 93 octane log:

https://datazap.me/u/mfknbimmerboy/l...=0&data=3-4-21

After missing boost target by about ~2 PSI (log above), I decided to flash a V7 stage 2 map knowing that my target would also go down to ~16 PSI. This was a test to see if turbos just couldn't handle 18 PSI anymore and these were the results:

https://datazap.me/u/mfknbimmerboy/l...=0&data=3-4-21

The car will occasionally smoke in parking lots (not very badly but smells like oil) after driving and I have decent wastegate rattle. I'm assuming my seals are on their way out and turbos will need to be replaced but I'd love to get some second opinions!

Any insight in observing my logs is very appreciated!

Dev

[Saif2018]

https://datazap.me/u/shelim2020/v10-...=0&data=3-4-23

V10 JSR custom tune

I'm aware of the timing corrections, but any further input would be much appreciated guys.

[TSilver335i]

Originally Posted by Saif2018

https://datazap.me/u/shelim2020/v10-...=0&data=3-4-23

V10 JSR custom tune

I'm aware of the timing corrections, but any further input would be much appreciated guys.

Looks good! I'd be happy with that.

Intake temps are getting up there do you think that whats causing corrections?

[Saif2018]

Originally Posted by TSilver335i

Looks good! I'd be happy with that.

Intake temps are getting up there do you think that whats causing corrections?

Thanks mate,

Car pulls hard, and definitely better than any OTS maps I tried.

IAT's usually go up a few degrees on a pull, a couple of degrees C mostly, I think the log was done when it quite warm ambient, hence the IAT rise.

I think the corrections are fuel quality related, since I tried a Octane booster previously and had hardly any corrections.

[Eriksson3_3]

Hey guys! Tuned my 335i and I'm kind of disappointed… I'm 20 and have never been in a fast car or anything even remotely fast. Even stock day 1 I was let down by the speed. Are my expectations just too high?

My mods are

Catless downpipes
Dual come intakes
MHD STAGE 2+
XHP STAGE 3 6AT


Maintenance:
All fluids changes
Cleaned intake valves
Replaced all vacuum lines

Might be forgetting some stuff…

Spark plugs and coil packs are old
Stock Intercooler
Stock Catback
Stock Chargepipe
Stock Diverter valves
Stock Turbos

https://datazap.me/u/eriksson33/slow...8;data=3-19-20

https://datazap.me/u/eriksson33/slow...&data=3-20

[Bimmer_Bro]

Originally Posted by Eriksson3_3

Hey guys! Tuned my 335i and I'm kind of disappointed… I'm 20 and have never been in a fast car or anything even remotely fast. Even stock day 1 I was let down by the speed. Are my expectations just too high?

My mods are

Catless downpipes
Dual come intakes
MHD STAGE 2+
XHP STAGE 3 6AT


Maintenance:
All fluids changes
Cleaned intake valves
Replaced all vacuum lines

Might be forgetting some stuff…

Spark plugs and coil packs are old
Stock Intercooler
Stock Catback
Stock Chargepipe
Stock Diverter valves
Stock Turbos

https://datazap.me/u/eriksson33/slow...8;data=3-19-20

https://datazap.me/u/eriksson33/slow...&data=3-20

You need to change your tune. You are running a tune for which you do not have the supporting mods.
A few tips,
Replace you plugs and coils... these are under a ton of stress when tuned, they should be replaced beforehand.
The stock intercooler is absolutely terrible even on the oem map. It gets heat soaked very easily robbing power and causing timing corrections. You can see the intake temp climb in your log causing timing corrections.
Stock charge pipe!!? Dude swap this asap. These explode even on oem tunes... this is going to crack and leave you stranded. Rule #1 is don't run a tune when you don't have the mods to support said tune.
Your low pressure fuel pump is starting to get a tad tired but it might last a little longer. It's dipping into the 50. (70s is ideal) It's ok for now but once it starts dipping in the 40s you need to replace.

[Eriksson3_3]

Originally Posted by Bimmer_Bro

You need to change your tune. You are running a tune for which you do not have the supporting mods.
A few tips,
Replace you plugs and coils... these are under a ton of stress when tuned, they should be replaced beforehand.
The stock intercooler is absolutely terrible even on the oem map. It gets heat soaked very easily robbing power and causing timing corrections. You can see the intake temp climb in your log causing timing corrections.
Stock charge pipe!!? Dude swap this asap. These explode even on oem tunes... this is going to crack and leave you stranded. Rule #1 is don't run a tune when you don't have the mods to support said tune.
Your low pressure fuel pump is starting to get a tad tired but it might last a little longer. It's dipping into the 50. (70s is ideal) It's ok for now but once it starts dipping in the 40s you need to replace.

Just placed an order for a charge pipe and intercooler. Would not having those really affect performance that much? Boost gauge reaches about 18.8 but I'm not really thrown back in my seat.

[Bimmer_Bro]

Originally Posted by Eriksson3_3

Just placed an order for a charge pipe and intercooler. Would not having those really affect performance that much? Boost gauge reaches about 18.8 but I'm not really thrown back in my seat.

You car should be pretty quick since you are teaching target.
Good man. Charge pipe will not improve performance but it will handle the extra boost since they are metal vs plastic.
You will notice a difference with the intercooler. In your logs you can see where it starts to pull timing when temps get up. This is robbing some power so you should get that back as well as your car being happier.
Do you have access to 93 or 94 fuel? The 93 map does make prob 20extra hp with 93/94 fuel.
My other suggestion is to try V7. This is my favourite map. The boost on V7 comes on a lot harder and faster than V9 or V10. Gives you more of that kick in the pants feeling.
9 & 10 are technically slightly more powerful but they have a smoother boost curve.
V7 also tapers towards redline which is better on your oem turbos since they loose steam up top.
V10 would technically wear them out a little quicker.

[Eriksson3_3]

Originally Posted by Bimmer_Bro

You car should be pretty quick since you are teaching target.
Good man. Charge pipe will not improve performance but it will handle the extra boost since they are metal vs plastic.
You will notice a difference with the intercooler. In your logs you can see where it starts to pull timing when temps get up. This is robbing some power so you should get that back as well as your car being happier.
Do you have access to 93 or 94 fuel? The 93 map does make prob 20extra hp with 93/94 fuel.
My other suggestion is to try V7. This is my favourite map. The boost on V7 comes on a lot harder and faster than V9 or V10. Gives you more of that kick in the pants feeling.
9 & 10 are technically slightly more powerful but they have a smoother boost curve.
V7 also tapers towards redline which is better on your oem turbos since they loose steam up top.
V10 would technically wear them out a little quicker.

Wow man thanks for all the info. I will log again after installing the charge pipe and intercooler. Thanks!

[Bimmer_Bro]

Originally Posted by Eriksson3_3

Wow man thanks for all the info. I will log again after installing the charge pipe and intercooler. Thanks!

Anytime. Try version 7 for fun. Does not cost anything to switch versions.
With your current mods you should be on the stage 2 map which is downpipes and oem intercooler.
2+ is for downpipes and upgrade intercooler.

Which intercooler did you go with? OEM connections? If so make sure to purchase new o-rings before install. I think the green one is hot side and the black one is cold side (exit)