VOES Switch Explained

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Oct 13, 2018 | 06:47 PM

#21

ronks2

Intermediate

Joined: Nov 2014

Posts: 37

Likes: 3

From: South Florida

Read your post here and you seemed like the guy to ask.

Have a quick question. Should the VOES on a 1994 Harley Fatboy with CV Keihin carb hold pressure when I put a vacuum gauge on it?? If so how much?
Checked mine quickly with a pump and it had no interest in holding any pressure.

Thanks,
Ron

Oct 13, 2018 | 07:30 PM

#22

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,962

Likes: 8,056

From: poway

Quote:

Originally Posted by ronks2

Assuming you mean vacuum, it should hold 30 in-hg easy.. It should not leak. Make sure you tool is OK.

Oct 13, 2018 | 08:21 PM

#23

ronks2

Intermediate

Joined: Nov 2014

Posts: 37

Likes: 3

From: South Florida

Yes vacuum, sorry typing stream of consciousness.

Oct 13, 2018 | 08:46 PM

#24

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,962

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From: poway

No problem. After all vacuum is only negative pressure to some reference pressure. In this case ambient.

Oct 16, 2018 | 01:42 AM

#25

Def Mute

Outstanding HDF Member

Joined: Nov 2012

Posts: 2,422

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From: Fla

If the VOES had a vacuum leak, would that not affect idle by disrupting the air/fuel ratio?

Oct 16, 2018 | 08:18 AM

#26

Max Headflow

Seasoned HDF Member

Joined: Dec 2005

Posts: 19,962

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From: poway

Quote:

Originally Posted by Def Mute

If the VOES had a vacuum leak, would that not affect idle by disrupting the air/fuel ratio?

Nope, It would..

Oct 17, 2018 | 06:17 AM

#27

98hotrodfatboy

Seasoned HDF Member

Joined: Mar 2010

Posts: 21,147

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From: Poolville

But it will affect idle speed because at idle the timing should be at full advance when switch is grounded...

Aug 23, 2019 | 05:40 PM

#28

hoochanelly (Hooch)

Stage I

Joined: Aug 2019

Posts: 1

Likes: 0

From: Batesville

unanswered ? about voes

Quote:

Originally Posted by BigJames618

if its bad will it cause the bike to die while running once engine is hot

Big James I'm kinda suspicious of my vacuum line from my diaphragm to carburetor collapsing after engine warms up and running at high speeds, I have a 2003 xl883c custom anniversary edition Harley Davidson sportster.
at high rpms the engine, head lights shuts all shut off the bike slows down backfires and comes back on. If I ease along it's all cool but when I build up high rpms it will shut down pop and spit out the carburetor come back on .I don't think it's the voes its self but the vacuum line collasping. well that's my story and I'm sticking to it