EGR Deletion & EGR VSV?

[chris89]

Ok, so when i rebuilt my engine, i deleted the whole egr system. I removed the egr vsv and started to run a little weird, like surging and hesitation, really strange engine performance. I reinstalled the vsv but I don't know exactly how i should route the vaccum hoses since i don't have egr anymore. What i did was run the One vaccum hose to the Factory Stock location, which is to the vaccum tree and I just ran the other one straight to a nipple on the throttle body. Does anyone else have the hose routed differently?

 

[Big Wang Bandit]

:rofl:

 

[jetjock]

Lol....

 

[conundrum07]

Loop the TB back to itself and plug the port under the IM. IIRC the vac ports on the TB are before the throttle blade so you are introducing a leak with how you ran it.

 

[chris89]

the picture doesn't show clearly enough how i have it setup and no i don't have a leak and why the heck would i loop the tp back it itself rather than capping it off? Explain why i'de want to cap off the other vaccum port on the VSV rather than running it to the throttle body? And what would the ECU think if i had it runnning to the Throttle body or Capped off? I was guessing the ecu would think that the EGR valve was stuck open if i ran it straight to the throttle body causing reduced spark advance and Timing retard, And if it were capped off it would think that the EGR valve was Always closed for I'm guessing optimum spark and timing advance?!?
Option #1

OR
Option #2

 

[conundrum07]

Looping the tb to itself is the same as capping both ports. I did it that way since all it took was about 4" of vac hose which I had on hand. Remove the VSV underneath and cap the port on the vacuum rail thing.

Your second pic is correct, but you dont have to leave the VSV in there if you dont want to. Capping the hose at that hard line does the same thing and that way the VSV can be removed.

 

[jdub]

Ahhh...a case in point

 

[jetjock]

You're confused. Do exactly what conundrum said. Either loop the TB ports together or cap them off, then cap off the VSV ie; option 2. Or remove it altogether and cap the pipe. Unless you failed to cap the ports and manifold pipe prior to all this your engine problem has nothing to do with the VSV. It's an output device. Except in California cars the ECU has no idea whether the VSV is there or not and even in that case it's only in an indirect way.

Dub: Indeed

 

[Nick M]

One other thing, the throttle body gives ported vacuum, not manifold vacuum. For future refrence. At least I think it is in front of the throttle plate. I will have to look now.

 

[conundrum07]

At least I think it is in front of the throttle plate. I will have to look now.

I believe thats correct, but its been a while since ive looked :dunno:

I figure they would just draw vac directly off of the manifold if it was the same.

 

[jdub]

One other thing, the throttle body gives ported vacuum, not manifold vacuum. For future refrence. At least I think it is in front of the throttle plate. I will have to look now.

Your memory serves you well Nick...just looked at a TB in the garage. The port is in front of the throttle plate, 3000 pipe side.

 

[jetjock]

Of course of it's ported (oops, that's sounds snotty ) because EGR must not be enabled at idle. Same with the EVAP system.