So its been going on for awhile and since I plan on getting a bolt on FMIC I figured might as well address it. So I'm not sure which gear because when your flooring the throttle. Between watching boost, rpms, the road/pot holes. Shifting is just nature so any way. At one point the boost hits 10 psi on my aftermarket boost gauge, but it goes back and forth from 8 to 10. The car doesn't stop pulling hard its just the gauge is bobbing. It shows 1 psi about 2600 rpms. Should I worry about the bobbing or is that normal?

My knee-jerk response would be boost leak test.

In case you've already performed an in-depth blt, is the sunpro mechanical or electric?

Where do you have your boost gauge tapped into? And do what Pie recommended and do a boost leak test. It could be a small leak in any of the vacuum hoses check the lines going from the boost controller to the waste gate. Also do you have a manual boost controller or just the stock one.

Do you have the stock soft-piping for the intercooler on it?

Hose flex = boost bobbing

EDIT:
Didn't read your profile, I see you have upgraded piping, but is there soft-piping ANYwhere?

Also, as the others have mentioned, do a BLT.
You have to have a leak because stock wastegate pressure is higher than 8.

Upgraded boost gauge. Sunpro. And I found the problem and fixed it, but another problem is my piping from bov to intake is leaking air.

wolf alchemy said:

Upgraded boost gauge. Sunpro. And I found the problem and fixed it, but another problem is my piping from bov to intake is leaking air.

Click to expand...

What was the reason? since everyone's bov and uicp is different, I suggest going to advance and getting a generic radiator hose that fixed like myself and 95%

Well the plastic pipe dist fit on tee so I melted the plastic together. Held for 4 months of 0-10 psi.