02 GTP boost issues

[02GTPanniversary]

Okay so, I just bought a 2002 gtp 40th anniversary I love it, but when I got the car I notice the boost guage only gets to half, and it wont stick, it'll drop and raise while it's WOT.. I unplugged the vacuum line from the solenoid and I get about 90% boost, it'll reach 100%, but drop and raise between 92-100%.. The T connector on the vacuum line below the S/C is cracked and had to be taped, so that could have boost leaks, Hopefully somebody here has a explanation, and also where can I buy the vacuum line w/ the T connectors?

[KeithGTP03]

I think you found your own explanation. I got my vac lines here Silicone Hose Kits - 7 colors
You can stick with black or choose a different color to dress it up

[02GTPanniversary]

I'm debating on either replacing the vacuum line w/ the T connectors, or replacing the solenoid.

[KeithGTP03]

The T connector on the vacuum line below the S/C is cracked and had to be taped,

I would replace the vac lines and T first.

[torq455]

Agreed.

[t24moore]

Unplug the electrical connector to the solenoid to see if your boost goes up.

[02GTPanniversary]

The connector and the vacuum line both? Or plug the vacuum line back in, and just unplug the connector?

[02GTPanniversary]

With the vacuum line connected and the eletrical unplugged, only get half boost, with the vacuum line unplugged i get bout full boost

[Explicit_Spade]

The only way to truely check boost is to use an actual boost gauge. Don't rely on that little bar on your dic.