[Theador]

I'm trying to fault find, and diagnose some rough running/struggling under WOT and hesitation issues on my 335i.

Car has:
MHD v1.4 map v6.1 stage2 93oct_98ron
Catless VRSF DPs
New standard O2 sensors
Shell V-Power MAX in the tank
otherwise standard enginewise
Drivetrain has a QUAIFE LSD

My feeling is I have a problem with the secondary cats, I'm getting these two codes regularly:
29f4 catalytic converter conversion
29f5 catalytic converter conversion 2

My question is, which sensors should I switch on and log in MHD, and what should I be looking for in Datazap.me? So far, all I can see is some negative LTFT fuel trims. I've linked a log here done on a relatively cold engine:
http://goo.gl/KjaZOT

[MHD Tuning]

Try a long flash write (8-20 mins). You'll need to provoke it by adding an option that requires a long write like boost per gear (and use 20psi if you don't want it to interfere).

[Theador]

Originally Posted by MHD Tuning

Try a long flash write (8-20 mins). You'll need to provoke it by adding an option that requires a long write like boost per gear (and use 20psi if you don't want it to interfere).

Thanks, I actually did a long flash write yesterday as I got an error on the short write. Haven't tested the car since so hopefully that'll help. Will all readings be automatically logged or do I need to select which ones? I've noticed a couple of times the app says something like 'can't add more da da da, try deselecting some'

[MHD Tuning]

Originally Posted by Theador

Thanks, I actually did a long flash write yesterday as I got an error on the short write. Haven't tested the car since so hopefully that'll help. Will all readings be automatically logged or do I need to select which ones? I've noticed a couple of times the app says something like 'can't add more da da da, try deselecting some'

If a map update fail, you can select "map recovery" and this will simply perform the 2min map update.
Logging and Gauges share the same channels, and you can't exceed 30 channels.