Secondary Remove guide?

[Funracer]

Plenum and IHs out for porting. I want to remove or wire open the
secondaries while everything is opened up.

I DO want to remove all the secondary system vacume components under
the plenum. Tired of looking at all the spaghetti. Any step by step guides posted with pics?

Lots of posts that say "Rip em out" but Im looking for something more
specific. What to remove, what open holes to plug, what wires to unplug or leave in, etc, etc. I do want to maintain the cruise control.

With help maybe I can get it right the first time.

Thanks

[Dynomite]

Originally Posted by Funracer

I DO want to remove all the secondary system vacume components under
the plenum. Any step by step guides posted with pics?

What to remove, what open holes to plug, what wires to unplug or leave in, etc, etc. I do want to maintain the cruise control.

With help maybe I can get it right the first time.

Thanks

This will get you started

I would NOT use wire to hold the secondaries open......but then again......
if you are not sure you want to eliminate the secondaries.....maybe a temporary fix using wire would be your best option.

Using wire to fix the secondaries open is a lot simpler for sure especially if the engine is in the car.

See Technical Index

LT5 Eliminated Systems

Vacuum Systems (Secondary and Cruize/HVAC)

[Funracer]

Originally Posted by Dynomite

This will get you started

See Technical Index

LT5 Eliminated Systems

Vacuum Systems (Secondary and Cruize)

So everything in the first two photos is removed and everything
in the second two photos (cruise) remains?

[Dynomite]

Originally Posted by Funracer

So everything in the first two photos is removed and everything
in the second two photos (cruise) remains?

You can keep or eliminate the Evap Purge vacuum lines also. I kept the Evap Purge in place as I installed a new charcoal cannister back by fuel tank. If you eliminated Evap Purge you would have to cap off the Evap Purge Vacuum source under Plenum.



Cruize Control and HVAC Vacuum System ..............................EVAP Purge Vacuum System with Solenoid


Marc and Pete suggested to eliminate the EVAP Purge circuit completely and capping off that vacuum source under front of plenum. I just replaced my charcoal canister and Marc says he does not address that removal in the chip as it has no effect. I left that associated vacuum and electrical connection including the Evap Purge solenoid in place under the plenum.

[Funracer]

Originally Posted by Dynomite

You can keep or eliminate the Evap Purge vacuum lines also. I kept the Evap Purge in place as I installed a new charcoal cannister back by fuel tank. If you eliminated Evap Purge you would have to cap off the Evap Purge Vacuum source under Plenum.

Did you keep it for emissions testing purposes? No testing in Florida
so I will pull it.

[Dynomite]

Originally Posted by Funracer

Did you keep it for emissions testing purposes? No testing in Florida
so I will pull it.

No.....I register vehicles in SD....so no emissions testing there either. Like I say...I kept it because it is a simple circuit and I just replaced charcoal canister.....and probably keeps the gas fumes down when I gas up

Besides...I did not want to eliminate everything at once for fear that some would say I no longer have an LT5