Please help!! 2013 BMW M5 power cut on high boost!

[M5addicted]

Hey, I'm new on forum, please help, i tried almost everything. Well the issue is when accelerating hard , pedal to the floor ( DSC OFF ) 1st gear start spinning wheels, when changes to 2nd gear power cut off, drops to about 2k RPM, loss of power ( 4k miles on new engine replaced, spark plugs, ignition coils, HPFP, MAF sensors, Injectors, air filters, Oil radiator, O2 sensors ) all changed! Did stage2, thought gonna fix the problem still, even the car drives like stock ** ( stock 7.69 kph 100-200, st2 ~ 7.5 kph 100-200 ) checked logs with tuner, said it looks good. No codes, no CEL , been at couple shops they don't know *May be someone had same problem ? Soon will upload the video.

My last log 3rd gear

https://www.autotuner-tool.com/en/lo...165bad039d6a3c

[M5_Raz]

Are your spark plugs gapped correctly?

[M5addicted]

Originally Posted by M5_Raz

Are your spark plugs gapped correctly?

Didn't gapped them, like it is bosch bmw.

[M5_Raz]

You'll have this problem running stage 2 on stock gapped spark plugs. But it sounds like you had it happen before you did stage 2, so I'm not too sure.

Hopefully someone better versed in this will respond.

[TinCanSailor]

+1 on what @M5_Raz said. Buy a step or two colder plugs and gap them to help improve spark. When you go WOT on factory plug at factory gap you are basically blowing the spark out. Hit up Burger Motor Sports, get their colder plugs, gapping tool and narrow walled socket. Check all the ground wire for contact as you button things back up.

If you have a wet/oiled filter cold air intake I would take the maf oil and spray them out really well with maf cleaner as the oil will skew the maf input. The double and triple check vacuum hoses and air intake as any unmetered air will cause problems

[M6Roar]

I can see wheel spinning or bumpy road, TB taking dips, 2 knocks and cylinder 3 is taking a big dip.

First knock is fine but the 2nd isn't. what type of fuel are using and what type of fuel are you tuned for? also check your gap.

[M5addicted]

Originally Posted by M6Roar

I can see wheel spinning or bumpy road, TB taking dips, 2 knocks and cylinder 3 is taking a big dip.

First knock is fine but the 2nd isn't. what type of fuel are using and what type of fuel are you tuned for? also check your gap.

93 oct pump gas

[M6Roar]

Originally Posted by M5addicted

93 oct pump gas

Gap your plugs since OEM gap is 0.030 I think, and stage2 require 0.023" or 0.022". Had the same issue with my friends car resolved after gapping.

Don't forget to do a adaptation reset after gapping

Do another log and lets see. I hope the gap fixes it

[M5addicted]

Originally Posted by M6Roar

Gap your plugs since OEM gap is 0.030 I think, and stage2 require 0.023" or 0.022". Had the same issue with my friends car resolved after gapping.

Don't forget to do a adaptation reset after gapping

Do another log and lets see. I hope the gap fixes it

Thank you

[Blaxwil]

Originally Posted by M6Roar

Gap your plugs since OEM gap is 0.030 I think, and stage2 require 0.023" or 0.022". Had the same issue with my friends car resolved after gapping.

Don't forget to do a adaptation reset after gapping

Do another log and lets see. I hope the gap fixes it

If that doesn't work, check to ensure all your screws are tight and the connection on your DME's are snug. Had this same issue. During the shift from 2nd to 3rd, the jump pops the DME's out just enough for the connectors to slip out. When you let up off the throttle, they slip back in.

[Arwon]

HI , look I'm new here and others may be able to explain this, but the High pressure fuel drops off quite a lot from 4400rpm to 5800rpm, going down to 98 bar while the target setting is still about 198 bar.
I am looking into a similar problem with mine and will start running logs on mine in a similar manner.
Like i say this might be explainable with high fuel demand at those revs, but i doubt it.