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10-27-2010
For the past few weeks ive noticed my boost is getting lower and lower. I dont know what is happening. Now its down to 2 bars of boost on full throttle. Anyone have this happen? It seems like my gas mileage is going down too.. Please if anyone has had this problem i need some help
10-27-2010
do you have a scan gauge? does your car seem to idle normal?
10-27-2010
What do you mean by scan gauge? And yea it idles normal. When its cold around 1000 rpm and warm about 8000
10-27-2010
if you have to ask then you dont have one... lol
do you have any mods?
10-27-2010
My dad works for a dealer and has a scan tool that checks engine codes and everything. The person who had the car before me has a msd ignition in it and thats all i believe.
10-27-2010
and no codes are coming up?
10-27-2010
No, no codes. At first i thought it was because i had a new catalytic converter installed but it kept getting less and less boost.
10-27-2010
does it feel slower?
10-27-2010
I just noticed tonight accelerated hard and only like two bars of boost showed up. I havnt had time to really see if its any slower. Didnt seem a ton slower.
10-27-2010
my buddy actually had the same problem tonight, he just tightened/replaced all his t fittings under his supercharger and it fixed the problem.
10-27-2010
You have a vacuum leak find it and fix it.
10-28-2010
Problem could be a vacuum leak, however it's more likely the boost control soleniod is going bad. While doubtful the actuator could have an issue as well.
10-28-2010
How would i go about finding the vacuum leak? If i push down on one of the belts should there be any play? It still sounds like the supercharger is running
10-28-2010
could the vacuum leak cause anything with gas mileage?
10-28-2010
Very much so.
Probably the rubber "T" fittings and lines around the fuel rail and blower and the one from the TB to the EVAP solinoid. Most common problem with these cars besides LIM gaskets...dry rot.
10-28-2010
So most likely a vacuum leak? Are they a pain to fix?
10-28-2010
All you have to do is replace the rubber "T" fittings and plastic lines around the blower and fuel rail like I stated. You can buy the entire set from a GM dealer for less than $30.
10-28-2010
Ok thanks. Is it going to hurt the car if i drive it like this ? Is it actually affecting my boost or just the gauge?
10-28-2010
its making your car run lean, which youll blow it up if you keep rocking on it.
10-29-2010
Obvious Vac leak.
just as general maintance replace your "T" Fittings and al your Vac hoses
any GM dealer has the Whole Vac line set for pretty cheap or you can go to an autoparts store and get rubber line and run those.
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