Bad N75?

[tdubz]

Im having a problem I had Revo stage I and would boost 16 pounds and then when I added the test pipe it would go to like 17-18, then recently the car started feeling slow so I got stage II and the boost only goes to 15 pounds and wont hit 21, and from time to time when im on the highway in 5th gear and play with the throttle it will go up to about 20 then drop down but still feels slow, do you think this could be a bad n75?

[A4ringedONE8T]

What are your SPS settings on?

[A4ringedONE8T]

And with the stock turbo typically boost levels are 20-21 spike immediately dropping off to 18 and tapering down to 13-15 by 6k

[tdubz]

I dont have a sps, and when Im driving it will spike at 15 and then slowy drop down to 10psi a little before redline

[LampyB]

pressure test for a boost leak before labeling a bad N75.

[widgget]

yup, sounds like a boot leak, i would check for that first.

[tdubz]

yea I did a pressure test and there was a check valve that broke and replaced but still the car is doing the same thing

[LampyB]

and you're sure that there isn't an additional leak somewhere?

[tdubz]

there might be I have to check again