I recently went with a Supercharger pulley from Eurocharged and tuned all my mods together and everything was just so N'Sync. After a week I started noticing loss of power, strange acceleration whistle, etc. I posted about this on a thread not too long ago, but finally was able to take it in today to get it looked at.

Right off the bat the IAT's were up in the 180-190 range. Red flag. From what my mechanic said it should not be above 120 or the Supercharger will completely cut off. So that explains my power loss.

We took off the bumper to examine my Johnson IC pump and Water Pump and noticed my coolant level was low. Looked at both pumps and noticed the water pump was leaking baaaaad. Which explains why not enough cool air was getting through. Ended up replacing the water pump with a aftermarket one and hardwiring my IC pump to my ignition so everytime I turn the car on it engages it instead of waiting on the computer.

Took for a test drive the car runs better then ever. The car is just ridiculous fast.

If your experiencing slow acceleration issues check your pumps. The stupid dealer wanted to replace my acceleration pedal sensor and never looked at my pumps.

Also on a side note I got the dreaded CPS code, so I replaced that with a flash.