[xm4tr1x]

Originally Posted by Saif2018

That's not with the Hybrid turbos was it?

Yer why you ask

[Saif2018]

Originally Posted by xm4tr1x

Yer why you ask

Well the log is dated May 2018 and is only pushing about 14psi up top.

Whereas your latest oscillating logs say hybrids?

[CarAbuser]

Originally Posted by Saif2018

Can you explain why a catted car the rpms would have minor fluctuations whilst stationery, if you revved up trying to hold a steady 2k for example?

Would have to see the logs to have a better idea. Even then the parameters required to troubleshoot that fully aren't included by standard as part of MHD but the usual timing and afr channels are a good start.

The tune can play a big part. A constant pedal position will ask the DME to produce a variable amount of torque from the engine as the torque request is based on pedal position and RPM. The reported torque is what the DME tries to match with the target torque and that value also varies hugely depending on how the tune is set up.

It could also be that the AFR is unstable because of bad fuelling. Or because of slight ignition issues. Both values are used to generate the reported torque.

[Saif2018]

Originally Posted by CarAbuser

Would have to see the logs to have a better idea. Even then the parameters required to troubleshoot that fully aren't included by standard as part of MHD but the usual timing and afr channels are a good start.

The tune can play a big part. A constant pedal position will ask the DME to produce a variable amount of torque from the engine as the torque request is based on pedal position and RPM. The reported torque is what the DME tries to match with the target torque and that value also varies hugely depending on how the tune is set up.

It could also be that the AFR is unstable because of bad fuelling. Or because of slight ignition issues. Both values are used to generate the reported torque.

That's interesting, I never found you could hold the revs dead steady by revving when stationary in any car, always some slight minor fluctuations.

I'll try and log it and see what you think.

[CarAbuser]

Minor fluctuations are to be expected. The RPM shown in MHD logs might fluctuate a little but the tach shouldn't as it's quite heavily smoothed.

[Saif2018]

Originally Posted by CarAbuser

Minor fluctuations are to be expected. The RPM shown in MHD logs might fluctuate a little but the tach shouldn't as it's quite heavily smoothed.

Ok, that's what I meant. Thank you for the explanation.

[husker335i]

Originally Posted by husker335i

If anyone could take a look at this log I’d appreciate it. Seems I’m chasing a boost leak but maybe I’m missing something. 2011 e90 n55. Mhd stage 1 with a Cobb charge pipe. Thanks!

https://datazap.me/u/toconnell25/log...=0&data=3-4-18

Anyone?

[xm4tr1x]

Originally Posted by CarAbuser

Would have to see the logs to have a better idea. Even then the parameters required to troubleshoot that fully aren't included by standard as part of MHD but the usual timing and afr channels are a good start.

The tune can play a big part. A constant pedal position will ask the DME to produce a variable amount of torque from the engine as the torque request is based on pedal position and RPM. The reported torque is what the DME tries to match with the target torque and that value also varies hugely depending on how the tune is set up.

It could also be that the AFR is unstable because of bad fuelling. Or because of slight ignition issues. Both values are used to generate the reported torque.

If tq reqis based on tps, the log shows tps fluctuations could this be where the fault is?

[CarAbuser]

Originally Posted by xm4tr1x

If tq reqis based on tps, the log shows tps fluctuations could this be where the fault is?

Tq req is based on pedal position. Throttle position is a different story, that's electronically controlled to maintain an airflow requirement and will oscillate as a symptom rather than a cause.

[Cyless]

Originally Posted by Saif2018

If you don't have any map packs (only the MHD flasher) then flash stage 0, clear codes and relog. Otherwise flash Stage 1 V9 or V10 at least then relog,

Do an Idle log, and a 3rd gear log.

At WOT your HPFP didn't drop below 1500psi, so it seems ok on that "unknown" map.

At idle your HPFP should settle to around 700 psi (after the cold start is finished)

Sorry for not replying for awhile but i just got done replacing a bank of my injectors with index 12 and the car still has the little exhaust pops/stumble on idle and as of yesterday car has been starting and driving vary weird, sometimes when I start the car it will rev between 500-1000k for some reason and now everytime im accelerating from a stop i get this single jerk in acceration going from 0-10 MPH.

Most recent datalog: https://datazap.me/u/cyless335xi/mos...og=0&data=3-22

[Saif2018]

Originally Posted by Cyless

Sorry for not replying for awhile but i just got done replacing a bank of my injectors with index 12 and the car still has the little exhaust pops/stumble on idle and as of yesterday car has been starting and driving vary weird, sometimes when I start the car it will rev between 500-1000k for some reason and now everytime im accelerating from a stop i get this single jerk in acceration going from 0-10 MPH.

Most recent datalog: https://datazap.me/u/cyless335xi/mos...og=0&data=3-22

Have the plugs been changed recently?

CarAbuser any ideas on what's causing these issues mate?

[Everett0731]

I have a question so I have a 2010 335i xdrive and want to convert it to rwd Ik I have to switch the whole front of the suspension.. would I be able to use a 3335i rwd oil pan on the 335i xdrive engine .. and would I need to switch the transmission?
Dose any one know the steps of getting this done

[Saif2018]

V7 custom tune,

Can you guys have a look and let me know what you think... ?

https://datazap.me/u/shelim2020/v7-j...og=0&data=3-23

@CarAbuser

@RSL

Timing corrections most likely due to the Tesco momentum fuel I used. Car felt strong throughout the pull. Still got that damn whine at low revs but otherwise running fine.

[Cyless]

Originally Posted by Saif2018

Have the plugs been changed recently?

CarAbuser any ideas on what's causing these issues mate?

Plugs and coils had been just changed as well as injectors.

Edit: I want to clarify that when I start it sometimes the car revs jump up and down between 500-100 RPM for like 25~ seconds then stops.

[Saif2018]

Originally Posted by Cyless

Plugs and coils had been just changed as well as injectors.

Edit: I want to clarify that when I start it sometimes the car revs jump up and down between 500-100 RPM for like 25~ seconds then stops.

Have you tried setting cold start noise reduction to see if it makes a difference?

Walnut blasting done?

Other than that, I'm not really sure what else could be causing it.

[Cyless]

Originally Posted by Saif2018

Have you tried setting cold start noise reduction to see if it makes a difference?

Walnut blasting done?

Other than that, I'm not really sure what else could be causing it.

I just cleaned my valves like a week or 2 ago and these problems have just came up (except the little stumble/pops in exhaust).

I also have not tried the cold reduction thing.

[oZades]

Fixed my boost leak. How is everything looking?

https://datazap.me/u/ozades/log-1650...data=3-4-20-21

[tej98]

Originally Posted by oZades

Fixed my boost leak. How is everything looking?

https://datazap.me/u/ozades/log-1650...data=3-4-20-21

Looks good to me. I see low timing corrections on each cylinder, but the MHD guide for reading these says anything up to 3* is normal? LPFP pressure looks great as well, is this a stock pump?

[Saif2018]

V8 map custom tune. Any input would be appreciated guys,

Timing corrections are due to crap tesco fuel I'm using at the moment. Pulled strong throughout, part throttle response seemed better.

https://datazap.me/u/shelim2020/v8-j...og=0&data=3-23

[Saif2018]

Originally Posted by oZades

Fixed my boost leak. How is everything looking?

https://datazap.me/u/ozades/log-1650...data=3-4-20-21

Looks good apart from way too many timing corrections across multiple cylinders.

Have you done Plugs and Coils recently?

Try adding some E85 to see if corrections go away, could be due to the fuel your using.

[accountname19]

Hey, can someone take a look at my logs? I think one of my fuel pumps has gone bad but not sure. I get misfires on several cylinders when driving and when idle
https://datazap.me/u/kontonamn1/335x...og=0&data=3-21

[Saif2018]

Originally Posted by accountname19

Hey, can someone take a look at my logs? I think one of my fuel pumps has gone bad but not sure. I get misfires on several cylinders when driving and when idle
https://datazap.me/u/kontonamn1/335x...og=0&data=3-21

Check your codes and find out which cylinders misfiring first, swap plugs/coils around to see if misfire follows.