I just had my upper and lower intake manifolds replaced and i noticed that my temp gauge stays at 100 all day. Could it be the sending unit??

It may be, have you checked the sensor and or connector? Maybe the wiring going to the connector became pinched in the process.

where would i look mr. boost?

i mean......i know what you are telling me to look for but i dont know the location of those components you mentioned.

I'd look in the area where you were working. Knowing that the wiring runs all around the engine bay, you were working on the intake manifold. That'* where I'd zero in. Look at all sensors that you unhooked and rehooked, any obvious things may be the issue.

Temp sensors are usually located by the throttle body end of the motor in 3800'*.

thanks. ill double check.

turns out....the connector was not hooked up all the way. got it fixed though. thanks for the input man.