after flashing stock car sometimes after 5-5.5-6k(always different) it stop runing fast and than rpm grows up very very slow, sims like boost goes down(very)
i flash back stock rom to the car but this trouble stil exist
sometis all is normal, but most of time after 5.5-6k rpm car slow down, very...
mods on the car is only TBE
what it can be?

 

it kinda sounds like a vaccum leak..

 

it kinda sounds like a vaccum leak.. has your ecu been reflashed?

 

i reflashed it, than flash back stock - doesnt help and now flash tuned rom again.

 

What is your knock sum/wideband afr/timing in that area. That is the first place to look for trouble. Also look at your load%, a boost leak will cause high reported loads and push you to the far right of the map (causing rich afr)

 

afr is normal, knock - 0, load goes down to ~50

 

have you checked your boost limit? maybe your spiking boost and the ECU is cutting out...but that would be a faster, more violent cut...not a steady slow rpm climb...

you probably already accounted for that. when i first installed my buschtser tbe/catdelete (only other mods were k&n cone and a works tune at the time), i was hitting boost cut in '04 and didn't know what the hell was going on. lol. same RPM area though and intermittent too.

just a thought.