N54: CEL on dyno

[Enfiftyfore]

To start off, I have a 2009 135i with JB4, 3" DP, and drop in filter. Running Map5 for the first two pull and Map2 for the last. 4th gear every time.

I had my car dyno'd today using a Dynojet. During the last two pulls, the check engine light came on. I had the bavtech with me but not my computer so I couldn't read the codes. On the first pull that my CEL came on, I just figured it was an overboost. I deleted all the codes and did another pull. The exact same thing happened on the next pull. At 5500 rpm, it hit fuel cut both times.

I will attach the dyno chart. If you look, the AFR went suuuuper rich up to when the fuel cut hit. I didn't do anymore because of the CEL. On the way home, I didn't have a CEL and the car was pulling perfectly fine. I went past 5500 rpm and multiple time and everything was perfect.
My question is, would the fan that they use to provide air to the car have anything to do with this? They just used one regular big fan, not the turbine type.

Input?

I'll upload the dyno sheet when I get to my computer.

[user2688]

We would need logs to be able to know what's going on. Could be a lot of things but logs and codes would help figure it out.

[Suds]

OP, do you remember what code was thrown? That would probably help.

[Enfiftyfore]

Just pulled them:

29F2
29E2
2A19
2FDB

668E

[Enfiftyfore]

I haven't checked what the FOL value is set at but it looks like it might be too high? The Afr on the last pull was 11.33. I would like some help por favor.

[kprocivic]

i just cleared 29f2 that was the fuel pump code. changed 2 sparkplugs that were also coding went right away.

[Enfiftyfore]

Originally Posted by kprocivic

i just cleared 29f2 that was the fuel pump code. changed 2 sparkplugs that were also coding went right away.

I'm not throwing a spark plug code though.

[mike@x-ph.com]

Without Logs it will be very hard to tell exactly what went wrong.
It could very possibly be your HPFP. Do a log so we can monitor how it is doing.
Other people got this problem solved by lower FOL . That being said i would start with monitoring the HPFP before changing any JB4 setting.

[Enfiftyfore]

Originally Posted by mike@x-ph.com

Without Logs it will be very hard to tell exactly what went wrong.
It could very possibly be your HPFP. Do a log so we can monitor how it is doing.
Other people got this problem solved by lower FOL . That being said i would start with monitoring the HPFP before changing any JB4 setting.

I will make a log tonight. Should I just log STFT and LTFT numbers?

[mike@x-ph.com]

Originally Posted by Enfiftyfore

I will make a log tonight. Should I just log STFT and LTFT numbers?

the JB4 will capture different parameters. Save the complete file and send it to jon@burgertuning.com

[Enfiftyfore]

Originally Posted by mike@x-ph.com

the JB4 will capture different parameters. Save the complete file and send it to jon@burgertuning.com

I don't have the JB4 USB cable, I'll be using bavtech. Which values should I be logging?

[mike@x-ph.com]

Originally Posted by Enfiftyfore

I don't have the JB4 USB cable, I'll be using bavtech. Which values should I be logging?

Ask Jon

[user2688]

Originally Posted by Enfiftyfore

Just pulled them:

29F2
29E2
2A19
2FDB

668E

29F2 & 29E2 see: http://www.1addicts.com/forums/showthread.php?t=1002296

Could also be influenced by ethanol added to your gasoline and the fuel pump struggling to compensate.

[Enfiftyfore]

Originally Posted by user2688

29F2 & 29E2 see: http://www.1addicts.com/forums/showthread.php?t=1002296

Could also be influenced by ethanol added to your gasoline and the fuel pump struggling to compensate.

Thanks. I read that thread already. That's what fave me the idea of FOL.