JB4 All maps 10psi, in and out of limp mode.

[joelcn91]

08 135i FBO, JB4 G5 ISO

During some recent spirited driving my car went into limp mode (4.5 psi) but didn't throw any codes.

I thought it could have been a boost leak. I checked all connections an all seemed fine. Started the car an it threw codes: 2ABC ; 3100. They went off but car was still in limp mode.

I was hearing a rattling sound so I removed cats with N55 midpipe thinking maybe they got clogged. Cleaned all the Tmap sensors (they look good). Checked jb4 connections disconnected an re-connected (with battery unplugged).

Now the car seems to be out of limp mode but has bad throttle response an wont spool until like 4500 rpm and its reaching a max 10.2 psi in spikes. on maps 1, 2 and 5. Its not backfiring or running rough just not making power an its lagging. No check engine lights.

Any help or suggestions?

I checked all my wire connections an for boost leaks. Not sure what to do next?

Here is the log:jb4.pdf

[darkrom]

Does it run right on map 0? Completely stock map?

[joelcn91]

It was running 7 psi on map 0. Maybe its me but it still didnt feel as responsive its taking a while to spool

[joelcn91]

I am getting wastegate chatter when i rev in neutral.

[mike@x-ph.com]

Post the log please

[joelcn91]

jb4.pdf

This was map 2

[joelcn91]

I also updated the jb4 g5 iso firmware to 28.7 it had no effect. I messed with the wastegate position an I can hear the rattling even when it is set to 0. It almost feels as though only one turbo is making boost.

I ideas would be greatly appreciated. I have spent 3 days trying to figure it out.

[edisapimp]

Assuming when you say "FBO" you mean downpipes; Check the positioning of the downpipe V-band clamps. One of the wastegate solenoid controllers (the rear) may be being impeded by the positioning of the clamps, and not allowing the wastegate to close. This is a common problem with the install of downpipes, but it usually throws a 30FF code. The other thing you may consider is a Vanos solenoid issue. Sticky Vanos may cause the car to feel like that, but again, usually throws a 2A87.

Edit: the above log needs to be in a datazap format for us to make sense of it.