Lean n54 over 5K rpm

[Basil335i]

Hello guys! I have a 2009 135i with jb4 vrsf downpipes bms intakes bms chargepipe with tial bov
So far I’ve replaced pre cat o2 sensors with genuine bmw o2 sensors, injectors with index 12, replaced hpfp spark plugs with oem bmw plugs dinan ignition coils the car stutters and afr shoot to very lean condition 17afr and up do you guys have any suggestions?
Idk how to post logs on here but I can email them thank you!

[ShocknAwe]

Log stock map and compare to determine if you have a problem or if you're being ambitious as you could just be out of fuel. You need to look at trims as well as low and high fuel pressures to ID if it's a fuel or air issue. Try their forum for JB4 support. N54tech.

Aside from a log or two stop pushing the car, if you're really at AFR 17+ you'll damage something eventually.

It's not the O2 sensors.

Did you put in new injector decouplers and seals?

Other feedback is the dinan coils are a waste of money.

[Basil335i]

Originally Posted by ShocknAwe

Log stock map and compare to determine if you have a problem or if you're being ambitious as you could just be out of fuel. You need to look at trims as well as low and high fuel pressures to ID if it's a fuel or air issue. Try their forum for JB4 support. N54tech.

Aside from a log or two stop pushing the car, if you're really at AFR 17+ you'll damage something eventually.

It's not the O2 sensors.

Did you put in new injector decouplers and seals?

Other feedback is the dinan coils are a waste of money.

I’m not really that good at reading logs so you mind if I email them to you?

[ShocknAwe]

You should post them on N54tech. I haven't read a JB4 log in several years

[Basil335i]

Originally Posted by ShocknAwe

You should post them on N54tech. I haven't read a JB4 log in several years

No worries I appreciate your advice!