does the car feel slower stepping on it from a stop or stepping on it from any rpm? this will help us help you a little bit more.

Just do a full tune-up on the car yourself it is not that hard. Your not going to feel any difference of the aftermarket parts really...unless you go all out and do full bolt-ons + osiris

IMO just do a tune-up and do an ecu reset procedure and again make sure you have good wear on your tires; changing the tires always helps me

 

Really? I always read that the intake spacer(if that is what the OP is referring about), was always considered a mod that actually produced gains, without loosing any HP. Is there like an interdependent dyno graph showing the difference between a stock Z/G vs the same car with the intake plenum spacer?

 

Perhaps.. but a dyno isn't what were talking about here..were talking about a car that the owner complains has " lost power "... that's butt dyno...that's all low end torque which is usually always traded for top end rpm.power when it comes to stuff like this.. im just telling ya.. leave the na mods off the car until you have them ALL and test pipes. And then Osiris it.. or you'll buy part by part n then post threads like this unhappy w the results.... over n over lol... we've all been there

 

Ah okay. I take it then the spacer give you an hp increase in the higher rpm range, with low rpm left at no noticeable change?

 

Lol... dont make me tell u to use da search jk..
Im trying to help close UP the lose ends on.this thread haha.. not give it CPR lol.

 

Spacer gains everywhere if you get the 5/16th.


Also, i'm sorry, but you're an idiot for ignoring advice. It's pointless modding a car that isn't in full running/serviced condition, you can't mask over problems that way.

You do *NOT* "fix" lost power by adding mods, you fix lost power by fixing the problems that caused it in the first place.

Also, polish of the intake yields nothing, already tested.