Toymods Car Club Inc: Tech & Conversions => 3SGTE idling problem Need info on EGR

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SilverGhost
Forums Junkie

Location:
Sydney
Registered:
September 2004

Re: 3SGTE idling problem Need info on EGR	Tue, 24 May 2005 09:42

Hi Guys, I was wondering if anyone can explain the function of the EGR Vacuum Modulator? Sounds like one of marvin the martians toys except it doesnt have 'space' in the title Anyhow, here is a vacuum diagram of the EGR system: I would have thought that the EGR VSV would just act directly on the Valve controlling when it opens and closes. The only thing I can think of is that air needs to come from somewhere to allow the EGR valve to close again after the throttle closes. A further assumption is that it uses either atmospheric or exhaust gas to achieve this, but I would like an expert opinion as it appears the modulator doesnt really change between the 2 diagrams except it has vacuum flowing through it to the EGR valve when the VSV lets it through. The reason for my question is that when my engine warms up sometimes when i fall back to idle (i.e. when coming up to lights) the engine has trouble staying alive, I found out this is because my EGR valve remains open allowing exhaust to 'choke' the engine. I thought the problem had solved itself, but it has returned. I want to determine what component could cause this as it appears that the valve itself moves freely. Thanks for your help [Report message to a moderator]

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