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I lost 10 psi??? I need help please

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Old 12-19-2008, 11:10 PM
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I lost 10 psi??? I need help please
Here is the deal..My car normally boosts right at 19 to 20 psi...For some reason it will only boost to 9 or 10 psi. You cant tell ant differance unless you get on it. It runs just fine. I dont know how long it has been doing htis. I dont drive it hard very often. It has 16xxx miles on it and my mods are in my Sig...Anybody have any ideas? Or has anyone had this problem? Help me please...lol

Anybody???
Last edited by Gixxerboy02; 12-19-2008 at 11:19 PM. Reason: Automerged Doublepost
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Old 12-19-2008, 11:17 PM
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descriptive title would help a lot. moved to problems and service
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Old 12-19-2008, 11:26 PM
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Do you have a stg2 belt or oversized tensioner? is the boost holding steady or dropping off?
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Old 12-19-2008, 11:32 PM
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Originally Posted by lsjwannabe
Do you have a stg2 belt or oversized tensioner? is the boost holding steady or dropping off?
I have a oversized tensioner pulley.. It holds steady at 9 or 10 psi.. The car has been modded for over a year with no problems.It also has new plugs if that matters
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Old 12-19-2008, 11:41 PM
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Have you checked your bypass sylenoid
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Old 12-19-2008, 11:48 PM
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Originally Posted by lsjwannabe
Have you checked your bypass sylenoid
No i have not started checking anything out just yet. Figured i would get on here first to see if anyone had some idea where to start
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Old 12-20-2008, 12:01 AM
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Thats the first place i would start
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Old 12-20-2008, 01:07 PM
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Bump...Any other ideas??
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Old 12-20-2008, 01:09 PM
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It could also be a faulty boost gauge... does the car feel noticably slower when you step on it?
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Old 12-20-2008, 01:12 PM
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Originally Posted by chris88z24
It could also be a faulty boost gauge... does the car feel noticably slower when you step on it?
Yeah it does not pull no where near as hard as it should..It dont miss or studder or anything though
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Old 12-20-2008, 01:23 PM
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definately check your boost bypass solonoid
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Old 12-20-2008, 01:25 PM
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Originally Posted by M88ArRamadi
definately check your boost bypass solonoid
Why would that go out so soon?? It only has 16xxx miles on it...Where is the boost solonoid located?? How do you know if its bad?
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Old 12-27-2008, 03:14 PM
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Originally Posted by Gixxerboy02
Why would that go out so soon?? It only has 16xxx miles on it...Where is the boost solonoid located?? How do you know if its bad?
bump, totally need to know where this solonoid is, no serious mods but definitely lost boost/never had it
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Old 12-28-2008, 04:04 PM
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Ok i did the boost bypass by unplugging the line and blocking it of. I got all my boost back..Next question is where can i buy a new solenoid and how much do they cost?? My wife has a 07 ss/sc. Im thinking about swapping them out and taking hers to the dealer.Its still under warranty lol
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Old 12-28-2008, 04:06 PM
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Originally Posted by Gixxerboy02
Ok i did the boost bypass by unplugging the line and blocking it of. I got all my boost back..Next question is where can i buy a new solenoid and how much do they cost?? My wife has a 07 ss/sc. Im thinking about swapping them out and taking hers to the dealer.Its still under warranty lol
now that would be win.
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Old 12-28-2008, 05:00 PM
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Originally Posted by pimpnwink
now that would be win.
Yeah i rather just buy a new one though..To much hassle. Where can i buy one???
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Old 12-28-2008, 05:02 PM
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dealership
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Old 12-28-2008, 05:08 PM
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can i get one from a local parts store??
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Old 12-29-2008, 05:16 PM
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Ok i changed the boost solenoid and it did not fix the problem...I said F it and just did the boost bypass mod..Any long term negative effects i shoild be worried about???
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Old 12-29-2008, 05:20 PM
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I was just gonna tell you to try the boost bypass mod... There can be some negative effects so I would do it for now and try to figure out what is causing the issues!
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Old 12-29-2008, 05:25 PM
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Originally Posted by 1badBlueberrySC
I was just gonna tell you to try the boost bypass mod... There can be some negative effects so I would do it for now and try to figure out what is causing the issues!
What are the negative effects???
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Old 12-29-2008, 05:26 PM
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To be honest it is just there to prevent over boosting...
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Old 12-29-2008, 05:27 PM
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Did your cooling pump crap on you, because that'sa symptom of severe heat. Car will permanently reduce boost if it sees the extreme heat from a dead intercooler pump.
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Old 12-29-2008, 05:28 PM
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Originally Posted by Psykostevo
Did your cooling pump crap on you, because that'sa symptom of severe heat. Car will permanently reduce boost if it sees the extreme heat from a dead intercooler pump.
Yeah, the 2.7 is a heat generatin' S.O.B. Start the car and make sure the fluid is flowing through the H/E fluid neck!
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Old 12-29-2008, 05:28 PM
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Originally Posted by 1badBlueberrySC
To be honest it is just there to prevent over boosting...
Right on man.. good looking out..Any ideas on what the problem might be? I would liketo fix it right but no luck so far...
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