Low Boots fix - Slow boot responce - Vacum line
08-21-2005, 04:19 AM
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Low Boots fix - Slow boot responce - Vacum line
All,
I found that the vacuum line going form the manifold to the SC bypass controller was binding the SC bypass valve.
After moving the vacuum hose to a new location I can now reach the 12.5 PSI on the boost gage. 
I have also notated that the boost response has gone up after moving the line. 
The vacuum line was starting to get a hole in it so I will get a new one form the dealer. 
I think every one should check this out on their 2.0 S/C.
1. Look at the diagram on the underside of the hood. The line that is going from the intake manifold to the controller is the suspect line. It will bind up and be worn by the SC bypass valve and fuel rail. I do not have a picture at this time but it should be easy to find if you look in the location that I described.
I hope this helps and if this has been found berfor then surry for the repeat info.
I took the fuel rail plastic cover off and pulled the line out of harms way. I will re-rought it later.
I found that the vacuum line going form the manifold to the SC bypass controller was binding the SC bypass valve.
After moving the vacuum hose to a new location I can now reach the 12.5 PSI on the boost gage. I have also notated that the boost response has gone up after moving the line. The vacuum line was starting to get a hole in it so I will get a new one form the dealer. I think every one should check this out on their 2.0 S/C.
1. Look at the diagram on the underside of the hood. The line that is going from the intake manifold to the controller is the suspect line. It will bind up and be worn by the SC bypass valve and fuel rail. I do not have a picture at this time but it should be easy to find if you look in the location that I described.
I hope this helps and if this has been found berfor then surry for the repeat info.
I took the fuel rail plastic cover off and pulled the line out of harms way. I will re-rought it later.
08-21-2005, 11:24 AM
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Originally Posted by GeoChevyCobalt
All,
I found that the vacuum line going form the manifold to the SC bypass controller was binding the SC bypass valve. After moving the vacuum hose to a new location I can now reach the 12.5 PSI on the boost gage. I have also notated that the boot response has gone up after moving the line. The vacuum line was starting to get a hole in it so I will get a new one form the dealer.
I think every one should check this out on their 2.0 S/C.
1. Look at the diagram on the underside of the hood. The line that is going from the intake manifold to the controller is the suspect line. It will bind up and be worn by the SC bypass valve and fuel rail. I do not have a picture at this time but it should be easy to find if you look in the location that I described.
I hope this helps and if this has been found berfor then surry for the repeat info.
I took the fuel rail plastic cover off and pulled the line out of harms way. I will re-rought it later.
I found that the vacuum line going form the manifold to the SC bypass controller was binding the SC bypass valve.
After moving the vacuum hose to a new location I can now reach the 12.5 PSI on the boost gage. I have also notated that the boot response has gone up after moving the line. The vacuum line was starting to get a hole in it so I will get a new one form the dealer. I think every one should check this out on their 2.0 S/C.
1. Look at the diagram on the underside of the hood. The line that is going from the intake manifold to the controller is the suspect line. It will bind up and be worn by the SC bypass valve and fuel rail. I do not have a picture at this time but it should be easy to find if you look in the location that I described.
I hope this helps and if this has been found berfor then surry for the repeat info.
I took the fuel rail plastic cover off and pulled the line out of harms way. I will re-rought it later.
Just checked mine, vacuum line is 90% worn through also, good idea for all to check. Thanx for the heads up Geo !
Steve.
08-21-2005, 11:40 AM
#4
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Originally Posted by Maverick
can somone please take a picture of this?
08-21-2005, 11:43 AM
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Thanks for the heads up. I whent out to check mine just now and there was just a very small amount of wear. Now that I have it moved a little bit it souldent wear anymore. Again thanks for the heads up!
08-21-2005, 08:48 PM
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Can anyone take a picture of this
I do not have the ability to take picture of this issue. 
It should help all with preformance if you move the vacuum line. I discribed it as best as I could but a picture would be better to help other people find what I am talking about.
It should help all with preformance if you move the vacuum line. I discribed it as best as I could but a picture would be better to help other people find what I am talking about.
08-21-2005, 09:08 PM
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Well i'll be damned! Hes right! my line damn near rubbed clean through. I'm ganna have to go get a new hose in the morning. Good looking out with the hose thing pays to check the forum
08-21-2005, 09:43 PM
#8
Domestics Pwn
I believe this is the point in the line GeoChevyCobalt is talking about (The one the arrow is pointing too... Not the white striped line).... Sorry about the size and what not of the pic... Had to downsize and adjust quality to meet websites upload constraints ! I only have 2800 miles on my SS ... My vacuum line was bound up and starting to rub through just SLIGHTLY ... but I have very few miles and can see where this would have become worse over time ! Good catch
08-21-2005, 09:52 PM
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Hi,
Good call Geo cause my hose also is slightly worn. However it is not worn enough that I'm concerning myself to get a new hose. I think the problem could be solved if the hose had a little more slack.
Tom
100th POST!!!!!! YAY!
Good call Geo cause my hose also is slightly worn. However it is not worn enough that I'm concerning myself to get a new hose. I think the problem could be solved if the hose had a little more slack.
Tom
100th POST!!!!!! YAY!
08-22-2005, 12:11 AM
#11
Domestics Pwn
If you just look at the line pointed out in the picture at the point where the circle is ... you can see that silver valve there... You will probably find that the line is very tight against it... that is where you will see the wear ...
08-22-2005, 08:37 PM
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I just checked mine, and my hose completely routed differently than the one in the pic, and apparently by a lot of people on here! Mine was routed nicely, except for the area where it's squeezed between the injector cover and thr blower. But so far, so good.
08-22-2005, 09:29 PM
#14
Senior Member
Originally Posted by phxSS
I just checked mine, and my hose completely routed differently than the one in the pic, and apparently by a lot of people on here! Mine was routed nicely, except for the area where it's squeezed between the injector cover and thr blower. But so far, so good.
08-22-2005, 10:50 PM
#15
Domestics Pwn
Can anyone take a pic of there hose that is not routed this way ? The one in the pic is moved slightly... When I first checked it... it was pinched pretty tightly in that circled area.. I just moved it up a little bit but it is still rubbing there... I played with it for just a minute and couldnt find a really good place for ... Or atleast it didnt seem to be a good place for it
08-23-2005, 07:24 PM
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Just whent to my local chevy dealer and they said that they will replace my vacum line so that was cool. Also if we could get a picture of what it looks like with the line in a bad loacation and what it should look like routed right then this might help anybody fix this issue.
Thank you all for the Thanks for the heads up and pics.
Thank you all for the Thanks for the heads up and pics.
08-24-2005, 03:45 PM
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Nice find Geo.
Did your hose have an actual hole in it when you found the problem, or was it just starting to wear? Also, what was your max boost before finding this problem and fixing it?
Did your hose have an actual hole in it when you found the problem, or was it just starting to wear? Also, what was your max boost before finding this problem and fixing it?