Hey guys, I'm having a huge problem with my car. Now first off it's a Auto HHR SS with the GMS1 Tune.

When i first got it installed about 3 weeks ago it pulled nice and seemed to go to 26psi and hold 24 no problem.

Now, No matter how many "test pulls" i do in a variety of speeds it either goes to 15psi and stays or 26psi then back to 24psi until i let off.

This is very annoying especially when having fun with the car is now gone cause you don't know if your going to get a stock feel when you floor it or the great feel of the stage 1 at 26psi

Does anyone have a clue as to why it's doing this? There is no codes being thrown or anything. On the HHR forums i tried putting it in competitive mode and the trans in "I" and all that jazz and it's always the same outcome.

The car is 100% stock other than the tune.

Thanks!

 

Mine is very consistent. It changes ever so slightly based on weather.

Don't both looking at it in 1st or 2nd gear, just get a look in 3rd or 4th.

 

Maybe a leaking sensor??

 

It's not supposed to be boosting 26psi anyways?

 

That to but he could live in a high allitude area.