Sometimes builds boost but rpm doesnt go up...

[v01dy]

Sometimes, when driving, my car builds boost but the rpm stays at around 2+k and doesn't go up. Also, I do not feel the increase in power that boosting usually creates. I'm thinking it might be my auto tranny slipping. Any ideas about what might be the problem?

 

[92eagleTSI]

If your tranny was slipping the rpm would go up so good chance thats not it. If its actually building boost but not much power it could be a bad case of knock. Do you have a logger?
What boost are you running? If it's knock then the ecu is pulling the ign timing back to try and control the knock resulting in a loss of power.

 

[cobb]

Have you tried a boost leak test yet becuase that would cause your boost to build but not have any power.
Also are you running stock IC piping? I know in my 2g i have a bad leak around my BOV. So just giving you places to check becuase i have had that exact same problem.

 

[ILLiCliPSE]

me too i have this problem every once in a while. id love to figure it out. it never happens at full throttle...it only does it when im driving around town normally.

 

[v01dy]

I think it might be knock. However, it happens usually at around 2-8psi. I do not have a boost controller but I usually drive around 12-15 although at wot it goes up to 18+psi for some reason. I don't have a way to tune my car yet I'm gonna do a boost leak check. It doesn't happen at high boost. Like illiclipse said, it only happens when I drive around normally too.