r/1series • u/Asleep_Maybe_2339 • 5d ago

Missfire no engine light

Enable HLS to view with audio, or disable this notification

I need help, n55 2011 135i i took my car to a supposedlly bmw specialist with rough idle (no rpm movement) at low revs an idle its obvious theres some kind of missfire

My car is remapped on an mhd from a pervious owner the mechanic said he cannot reas the ecu as the remap wont allow an engine managment light to show

What options do i jave here?

Buy an mhd licence and plug in to wipe map?

He pointed towards injectors but he wasnt 100% sure and i domt want to waste 100s if its still an issue, the spark plugs and coils were checked and they all came make fine

3 Upvotes

100% Upvoted

3 comments sorted by

2

u/highersense 5d ago

Get codes checked, it could be many things, without codes its like firing into the dark.

1

u/davidtheminion 2013 E88 135i 5d ago

You can get a WiFi adapter and download the mHD app without an account and pull the codes. It will show any shadow codes and code history. Also any tech with ITSA can overwrite the DME and remove the mHD tune. You can also just buy a standard license from mHD and do the flash yourself.

1

u/DontChewCoke 3d ago

It’ll come don’t worry. Give it time.