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lsj boost issues

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Old 01-11-2014, 01:44 AM
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lsj boost issues
so every ounce in awile when I get on it it will try to boost but kinda boogs and doesn't boost other times it boosts fine any ideas?
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Old 01-11-2014, 02:06 AM
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Worn out bypass solenoid?
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Old 01-11-2014, 02:13 AM
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Check the butterfly valve on the supercharger, you have to take of the sc to get to it
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Old 01-11-2014, 03:03 AM
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Originally Posted by SPDDMN36
Worn out bypass solenoid?
how do you test it to c if its working?
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Old 01-11-2014, 09:03 AM
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try posting this in problems and service

google the boost bypass mod
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Old 01-11-2014, 10:56 PM
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I just did but no replies
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Old 01-11-2014, 11:18 PM
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google the bypass mod and try it
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Old 01-13-2014, 12:47 PM
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Originally Posted by mrbelvedere
google the bypass mod and try it
Didnt work for me. All plugging that hole did was give me a fucked idle to the point where it would stall out.
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Old 01-13-2014, 01:24 PM
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Vac leak
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Old 01-13-2014, 01:39 PM
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Originally Posted by bluess26
I just did but no replies
If you haven't figured it out yet, the search function on this site is screwy. bad.

your best bet for any css.net searches is to actually go to google, type your search, and add cobaltss or cobaltss.net to the end of the google search.
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Old 01-13-2014, 03:15 PM
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site:cobaltss.net will search just the forum
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Old 01-13-2014, 05:01 PM
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Originally Posted by kobe77
Didnt work for me. All plugging that hole did was give me a fucked idle to the point where it would stall out.
yea im not gna try that lol that's what I read
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Old 01-13-2014, 05:10 PM
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Originally Posted by jp1600
Vac leak
Must be. Im getting gm to pressurize the system this week cause i dont have garage space or any of the **** to do it. i got the car to idle fine tonight after 10 minutes of ******* with it. idles good when shes warm
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Old 01-13-2014, 06:08 PM
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Originally Posted by kobe77
Didnt work for me. All plugging that hole did was give me a fucked idle to the point where it would stall out.
then you did it wrong or you got a different problem

there are 2 things that control it 1 is the boost bypass solenoid and the boost bypass actuator by correctly doing the boost bypass mod you take the solenoid out of the circuit and then that leaves the boost bypass actuator if you disable the solenoid by removing the vacuum source and you still have a low pressure problem then you either have a bad actuator or cracked vacuum lines or a stuck open butterfly on the blower
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Old 01-13-2014, 07:20 PM
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Originally Posted by mrbelvedere
then you did it wrong or you got a different problem

there are 2 things that control it 1 is the boost bypass solenoid and the boost bypass actuator by correctly doing the boost bypass mod you take the solenoid out of the circuit and then that leaves the boost bypass actuator if you disable the solenoid by removing the vacuum source and you still have a low pressure problem then you either have a bad actuator or cracked vacuum lines or a stuck open butterfly on the blower
told him to take the blower off and check, but i think this was looked over.
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Old 01-13-2014, 09:13 PM
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Originally Posted by jp1600
told him to take the blower off and check, but i think this was looked over.
yea im deff gna check that out and make sure no vac leak
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Old 01-13-2014, 09:14 PM
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Originally Posted by mrbelvedere
then you did it wrong or you got a different problem

there are 2 things that control it 1 is the boost bypass solenoid and the boost bypass actuator by correctly doing the boost bypass mod you take the solenoid out of the circuit and then that leaves the boost bypass actuator if you disable the solenoid by removing the vacuum source and you still have a low pressure problem then you either have a bad actuator or cracked vacuum lines or a stuck open butterfly on the blower
o ok I get what u are saying I googled it and it was coming up with everyone that said there car ran worse after
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