Boost bypass not really needed??!!
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Joined: Mar 2001
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From: CORAL SPRINGS, FL. USA
Sal--I copied Dons Bolt's diagram to the tee.The charger noise still came in a little early(around 1500 rpm's to 2000) Checked for kinks all fittings, etc. As soon as I reconnected it , it went away. Didn't do it at idle and when the engine was running I would pull our the pink hose to see if the solenoid would drop down(go to constant boost) and it did. So it really only happend at 1500.Just moaned too early.
LOL
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From: overthehill , in TAXVILLE= CENTRAL IL :)
idi awhittles version sal.
Originally posted by LightningTuner
To those who are experiancing noise from disconnecting the solenoid...
You guys must be doing something wrong. All the boost solenoid does is give the PCM the ablility to kill boost if it sees a failsafe. Unplugging the solenoid simply stops the PCM from being able to do that. It should not affect any other aspect of the truck, other than stopping the PCM from dumping boost.
When the Gen 2s first came out, many people were making the mistake of disconnecting the pink hose from the bypass itself. This DOES stop the boost dump, because you are killing the vaccum to the bypass. However, it also makes the bypass closed all the time, which will increase blower noise at idle, and also raise the intake charge by heating the air all the time since it can't bypass the blower.
Maybe this is what those who are hearing noise have done? I'd check it out.
To those who are experiancing noise from disconnecting the solenoid...
You guys must be doing something wrong. All the boost solenoid does is give the PCM the ablility to kill boost if it sees a failsafe. Unplugging the solenoid simply stops the PCM from being able to do that. It should not affect any other aspect of the truck, other than stopping the PCM from dumping boost.
When the Gen 2s first came out, many people were making the mistake of disconnecting the pink hose from the bypass itself. This DOES stop the boost dump, because you are killing the vaccum to the bypass. However, it also makes the bypass closed all the time, which will increase blower noise at idle, and also raise the intake charge by heating the air all the time since it can't bypass the blower.
Maybe this is what those who are hearing noise have done? I'd check it out.
here is a pic of the version i am using, hope it's cool andy seems pretty knowlegeable=
another boost bypass option
Last edited by EXCITED; Jul 1, 2002 at 12:09 AM.
Senior Member
Joined: Aug 1999
Posts: 5,438
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From: Palm Coast, FL
Excited, it looks like in Andys pic that he simply took the vaccum source line from the solenoid off the bypass, plugged it, and ran a new line right from the by pass to a full time vacuum source. That's perfectly fine.
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Joined: Sep 2002
Posts: 2,501
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From: Plainfield, Illinois
dont we have a built in bypass also? what happenes when we let off the gas when we are making a 1/4 run and makeing 15#'s of boost, and we let off... where's all that boost go? thanks, Shane
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Joined: Dec 1997
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From: L'ville, Ga
Shane you need to re-read this, it seems clear enough.
Originally posted by LightningTuner
To those who are experiancing noise from disconnecting the solenoid...
You guys must be doing something wrong. All the boost solenoid does is give the PCM the ablility to kill boost if it sees a failsafe. Unplugging the solenoid simply stops the PCM from being able to do that. It should not affect any other aspect of the truck, other than stopping the PCM from dumping boost.
When the Gen 2s first came out, many people were making the mistake of disconnecting the pink hose from the bypass itself. This DOES stop the boost dump, because you are killing the vaccum to the bypass. However, it also makes the bypass closed all the time, which will increase blower noise at idle, and also raise the intake charge by heating the air all the time since it can't bypass the blower.
Maybe this is what those who are hearing noise have done? I'd check it out.
To those who are experiancing noise from disconnecting the solenoid...
You guys must be doing something wrong. All the boost solenoid does is give the PCM the ablility to kill boost if it sees a failsafe. Unplugging the solenoid simply stops the PCM from being able to do that. It should not affect any other aspect of the truck, other than stopping the PCM from dumping boost.
When the Gen 2s first came out, many people were making the mistake of disconnecting the pink hose from the bypass itself. This DOES stop the boost dump, because you are killing the vaccum to the bypass. However, it also makes the bypass closed all the time, which will increase blower noise at idle, and also raise the intake charge by heating the air all the time since it can't bypass the blower.
Maybe this is what those who are hearing noise have done? I'd check it out.
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Joined: Sep 2002
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From: Plainfield, Illinois
I dont have any unusual blower noise but all I did was dis-connect the thing that WAS plugged in in the pic and what said unplug this from this. I did that. and that's it. Did I do something I shoudln't if that's all I did?
thanks, Shane
thanks, Shane
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Joined: Sep 2002
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From: Plainfield, Illinois
Originally posted by SVT_KY
Shane,
If you pulled the electrical connection, you're OK......
Shane,
If you pulled the electrical connection, you're OK......
I just wanted to make sure that by unplugging that I wasn't doing anything to really harm my engine. As long as I am not and all the tuners are saying it's ok I'm fine. Thanks for explaining it to me. Shane