[antoniog]

Hi all,
I can't clear 30bb code even after installing all new parts:
- new injectors (index 11)
- new coils
- new spark plugs
- DME (MSD80) was tested using hardware in loop by the ECU testing company and it's 100% functional (also tested the mosfets and they are good).

I've tested the wires (from DME to injectors) and the ground and everything is fine...

The only thing I can think of is timing chain...
Can a jumped chan cause the unremovable 30bb code?

[lookalikehuuh]

This guide seems to be pretty comprehensive for 30BB codes

https://us.autologic.com/news/bmw-ms...ector%20driver.

[antoniog]

Originally Posted by lookalikehuuh

This guide seems to be pretty comprehensive for 30BB codes

https://us.autologic.com/news/bmw-ms...ector%20driver.

I've followed this guide...
Wires are in good condition (tested using voltage drop test).
Mosfets are good (disassembled ecu and tested using multimeter).
I have even sent the DME to a specialised ECU testing company and they confirmed the DME is working fine...

[lookalikehuuh]

Originally Posted by antoniog

I've followed this guide...
Wires are in good condition (tested using voltage drop test).
Mosfets are good (disassembled ecu and tested using multimeter).
I have even sent the DME to a specialised ECU testing company and they confirmed the DME is working fine...

Did you try the Oscilliscope to map the signal that is being sent to the injectors?

[feuer]

I had this happen. Replaced all 6 Mosfets and was still getting 30bb and misfire on cyl 6 I think. Ended up installing msd81. This was in 2018. Still runs ok.

[antoniog]

Originally Posted by lookalikehuuh

Did you try the Oscilliscope to map the signal that is being sent to the injectors?

Can't start the car and therefore not possible to use oscilloscope...

[antoniog]

Originally Posted by feuer

I had this happen. Replaced all 6 Mosfets and was still getting 30bb and misfire on cyl 6 I think. Ended up installing msd81. This was in 2018. Still runs ok.

Will MSD81 fit the N53 engine (non-turbo)? Currently I have MSD80 one.

[feuer]

Originally Posted by antoniog

Will MSD81 fit the N53 engine (non-turbo)? Currently I have MSD80 one.

Yes, newer 330i n53 came with msd81

[antoniog]

Originally Posted by feuer

Yes, newer 330i n53 came with msd81

Thank you! I'll try the msd81 upgrade and will post an update in this thread soon.

[antoniog]

Upgraded to msd81, the 30bb code is gone but now getting 2E30 code and the engine is running in "half power" mode...

[Wolf 335]

Originally Posted by feuer

I had this happen. Replaced all 6 Mosfets and was still getting 30bb and misfire on cyl 6 I think. Ended up installing msd81. This was in 2018. Still runs ok.

feuer where did you source msd81?

[feuer]

Originally Posted by Wolf 335

feuer where did you source msd81?

This was years ago. DHGate I believe.