inconsistent boost

[03_mazdaspeed]

ok im new to these cars...my 03 when under full throttle sometimes will act odd when getting boost. The car will feel like its getting alot of power then it loses it and feels like its hit a wall power wise. what could be causin this it only does it sometimes

 

[ChopstickHero]

could be a number of things. one possibility is the wastegate actuator going bad. could also be tuning related. Some of the MSPs run very rich a/f mixture from the factory, so it could be bogging out from that.

 

[03_mazdaspeed]

ok thanks man ill check the WG out and see I just got the car had a Trans Am and the only other turbo car ive owned was a supra and never had a problem outta it.....it also lets out a squeal around 4500 rpms but only sometimes....again im new to these cars so hopefully i can get this figured out

 

[mazdaspeedson]

a squeal i am assuming out of the turbo yea i had that it was wierd i put a injen cold air intake on it and it went away