Well, I looked at that pic I had posted and it is a mess, yet it was crystal clear when I took the pic! I specifically remember that the line I disconnected was attached to the solenoid itself, NOT the diaphragm. That being the case, and the fact that mine was already installed and therefore right side up instead of **** up like Duplantisjj pic, it was also the one on the top. It may be the only line on the solenoid, but if there are 2 it is the TOP one when oriented as mounted. If this doesn't jive with what you are looking at, post back and I'll see if I can't take another pic this weekend that will tell us more.

 

hey so has anyone figured this out yet?? i got my truck tuned yesterday with the piggyback sytem still on it but the guy said if i want it right i need to get that stuff off. so im begining on the long road that alot of you have been down. any help would be nice!

 

All I did was pull the PCM out and look at all of the wiring pinouts. Follow the wires out about six inches and look at them. Certain wires are spliced and connected, others are not. You may have to sit and stare at it for a while to understand what they did. Every wire that is spliced needs to be reconnected/soldered to the way it was from the factory. ie: Purple to purple, purple/white to purple white, yellow to yellow...

Unplug your injectors wires (if you have installed 8 new 42# injectors) and plug your the vacuum on your bypass solenoid and then you should be ready to go.

BTW, this will help you out a little with your wiring assuming you have a '03 SS: http://www.yarnell.org/pcm/

Hope that helps, and good luck!

 

getting ready to do the same thing you guys are doing and was wondering if there is only one vaccume line on the solenoid to plug.
also with the bypass, will i be running less boost? if so do i lose much power?
do you recommend getting a smaller pulley when doing this?

 

If anything, you will gain a little boost by doing this. A smaller pulley is not necessary. If I remember correctly, there are two lines- not sure if they are both vacuum, but some whipple models are different as well. There is a long thread that describes this mod in detail. Read through it and you should know what to do.

Here it is: https://www.performancetrucks.net/fo...pple+piggyback

Here's another too: https://www.performancetrucks.net/fo...+vacuum+bypass

And another: https://www.performancetrucks.net/fo...pple+piggyback

And I saw another I had bookmarked but I can't find it now. Good Luck!

 

Thanks, but i was wanting to know how to bypass it on the two belt systems. If possible.

 

Several people have done that on here. I'm sure someone will chime in.

 

your talking about the 2 spare ones on the whipple itself right? and once you unplug them do you just leave them or what??

 

You can leave them or yank them and block them off with a plate.