not enough boost

[07gpgt]

I have an 07 gt just had to replace the water pump and belts along with tires and rotors. Ever since then (as I can remember) Im not getting even half of the boost out of it judging by the in dash boost gauge and its way slower now. I dont know what could have caused that. supercharger oil hasnt been changed since about 65k (I have 87 on it now), air filter seems clean. Anyone who could help I would appreciate it.

[KeithGTP03]

If your boosted you dont have a GT unless you did a top swap. But it sounds like a vacuum leak. I'd go through your lines and inspect them. Especially under the S/C nose drive. Here is a diagram. Pay no attention to the circle..it was for a boost gauge thread.

[Fivefingerdeathpunch]

07 GT = supercharged brah

05 was the last year for the GTP name, GT were givin the SC motor.


And yea, check your vac lines.

[KeithGTP03]

Good call...didnt know that. Maybe thats why they went bankrupt.

[redlinepontiac]

lol they went bankrupt for alot of reasons

[KeithGTP03]

This had nothing to do with it.

[blueguy]

Photobucket killed GM?

[RotyP]

Photobucket killed GM?

I learn something new everyday!

[KeithGTP03]

Hmmm...I guess the picture of the Aztec was sooo ugly, photobucket said 'no'

[Swiggles]

check your plugs and wires, hows other routine maintenance looking? these types of things can cause power loss. less boost doesnt always mean less power with a supercharged engine.

[collegewrench]

is it possible you routed the s/c belt wrong? it may look good, but i did it before to where it wasn't tight enough and slipped when engine reved. dnt ask how i managed it, but it can be done. lol

[07gpgt]

yeah I'll have to check the belt. ill prob take it to the dealer for the other stuff. my maintenance could be behind I know i'm prob overdue for plugs and i'm pretty sure i need to change the supercharger oil. thanks guys

[SilvaMan61]

id recheck your belt. and check for a vaccum leak chances are one, or both, of these is/are your problem.