Boost issues

[wrgibson]

I've got an RB20 swapped hatch with front mount and exhaust manifold...otherwise, stock.

If I slowly roll into boost, my boost gauge rises up to around 11 psi then gradually lowers back to around 9 psi where it sits until I lift. If I just romp on the gas the gauge rises up to around 9 psi then settles at 7 until I lift.

I'm on the stock turbo and wastegate. Any ideas of what I should check for? I'm not too sure if this could be caused by a boost/vac leak, but I'll check for them anyway.

Thanks for the help!

[Cjmartz2k]

Check for the boost leak. Listen for a vacuum leak. What's the vacuum at idle? Could also be a leaky/busted actuator.

[USMCgetsome]

i thought that was supposed to happen due to the boost solenoid on the bottom of the intake manifold!

[datsunmotorsports]

Seen that happen on engines with bad cylinders, or lack of fuel.

Check for vacuum problems first.