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Post Link Posted: Mon Sep 15 2008 2:14 pm
Post subject: vacuum switching valve
Reply to Anonymous Reply with quote





What are potential symptoms of a defective vacuum switching valve (for
the EGR system)?

Does the VSV go bad on the '96 I4 camry, typically?

Michael





switching vacuum valve
Sponsored Link












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Post Link Posted: Fri Sep 19 2008 4:14 pm
Post subject: Re: vacuum switching valve
Reply to Anonymous Reply with quote



The most problematic VSV is the evap one on the filter housing. Then
the carbon canister one. The EGR VSV much less problematic. It
basically turns off the egr valve at cold or idle so the vacuum
doesn't act on the valve.

You can follow the vacuum hose from the modulator down the firewall
side of the engine, somewhere between the intake plenum and rear
engine mount.

Are you having problems with EGR?



On Sep 15, 3:14 pm, mrdarr...@gmail.com wrote:

Quote:
What are potential symptoms of a defective vacuum switching valve (for
the EGR system)?

Does the VSV go bad on the '96 I4 camry, typically?

Michael












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Post Link Posted: Sat Sep 20 2008 9:11 am
Post subject: Re: vacuum switching valve
Reply to Anonymous Reply with quote



On Sep 19, 5:14 pm, johngd...@hotmail.com wrote:

Quote:
The most problematic VSV is the evap one on the filter housing. Then
the carbon canister one.



What are the symptoms of those failing?



Quote:
The EGR VSV much less problematic. It
basically turns off the egr valve at cold or idle so the vacuum
doesn't act on the valve.

You can follow the vacuum hose from the modulator down the firewall
side of the engine, somewhere between the intake plenum and rear
engine mount.

Are you having problems with EGR?



Looks like it. Stalls every now and then when coming to a stop (maybe
once a month now). I thought I had fixed it by replacing my EGR
modulator - no stalls for about a year after that.

Putting a nail in the EGR valve put a stop to it when it stalled
nearly every day (~ 1 year ago).

I'm suspecting a bad VSV or a leaky hose. I already cleaned out the
EGR valve with solvent last year

Michael












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Post Link Posted: Sun Sep 21 2008 5:20 am
Post subject: Re: vacuum switching valve
Reply to mred Reply with quote



On Sep 19, 8:14 pm, johngd...@hotmail.com wrote:

Quote:
The most problematic VSV is the evap one on the filter housing. Then
the carbon canister one. The EGR VSV much less problematic. It
basically turns off the egr valve at cold or idle so the vacuum
doesn't act on the valve.

You can follow the vacuum hose from the modulator down the firewall
side of the engine, somewhere between the intake plenum and rear
engine mount.

Are you having problems with EGR?

On Sep 15, 3:14 pm, mrdarr...@gmail.com wrote:



What are potential symptoms of a defective vacuum switching valve (for
the EGR system)?

Does the VSV go bad on the '96 I4 camry, typically?

Michael- Hide quoted text -

- Show quoted text -


If its the carbon canister one there will be no indication except an
engine fault light comes on.

The car runs just as smooth as before the fault.BUT? you need to get
it fixed before your next emissions test.












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