2010 Speed3 boost limitation with new factory ECU upgrade?

[ChaRLeS23]

Hi guys, I brought my 2010 speed3 to the dealer last week and as soon as I got out and went on the highway I noticed that it seems like boost is not holding 15 psi, specially on 5th and 6th gear, starting at around 3500rpm, until the redline. I noticed that if I release the gas and push on it again, it will climb to 15 for 1 or 2 seconds but will drop 1 bar right after. Before boost would hold 15 until about 5000rpm, and since the only thing they did was changing a busted wheel and upgrading the ECU to the latest version, I don't see what else could cause this. Anyone else have this problem? Thanks!

 

[_Chris]

Only thing it could be is what the change was to the ECU. The computer is what controls the boost on these cars. Take it back and tell them its not performing like it use to.

 

[minger]

You...redlined 6th gear? o_o

 

[faaque69]

yours is doing the same thing mine did. its the bad plastic recirc blow off that leaks by. i bought a SU dual port blow off and now mine holds boost

 

[chimmike]

yours is doing the same thing mine did. its the bad plastic recirc blow off that leaks by. i bought a SU dual port blow off and now mine holds boost

Uh, contrary to popular thought, the bpv is usually NOT the problem. Stock bpv held 20psi for me no problem. I'd be willing to bet it'd hold 20psi on my upgraded turbo as well.

I'm betting boost leak, that the dealer didn't tighten all the clamps properly.