Pontiac Solstice Forum - View Single Post - Cause of minor reduction in power/boost?
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post #7 of (permalink) Old 03-28-2019, 05:27 AM
sirwm's Avatar
Join Date: Aug 2006
Location: Shamong, NJ
Posts: 3,437
Originally Posted by Fortimir View Post
So this is one of those things that was minor enough I never really put much thought into it until now, but I'm curious.

I have a 2009 GXP with the GMPP Stage II tune that was professionally installed. It's all good. When I first got the car back in 2015, it was a bat out of hell and it wasn't terribly difficult to hit 22psi of boost. I think I even hit 23. I don't know if it was overnight, because I don't run it that hard often, but about a year or so later, no matter how hard I push it in 3rd or 4th gear, I cannot break 18 or 19psi, and the car just feels like it's missing that edge it had when I first got it. Aside from general maintenance (water and fuel pumps, cam solenoids, tires, oil, etc) and a stereo system install... I'm not sure I touched anything that would cause this.

Is it possible for a tune to revert to stock? ...
interesting... my son drives my yellow coupe, and he is saying the same thing... the "feel" is different...

following this thread...

Sir William's Fleet
Mean 2007 NA 2007 Solstice ordered on 8/24/06 - Picked up on 12/12/06 - Totaled on 6/12/10
Mean 2008 GXP Acquired 6/21/10 with 1275 miles on it - Summer Solstice !
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Mean 2009 GXP Coupe Acquired 8/27/16 with 9100 miles on it
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