[DML] Re: My first tune up: Making progress, not quite there yet
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[DML] Re: My first tune up: Making progress, not quite there yet



Nice use of technology! It was nice to hear how other engines 
sound.  I also wondered about this "glug" noise as well when I let 
my foot off the gas.  I live on a steep hill, and experience this 
quite often on my way out for a drive.  Nice to know that this is 
normal and not some sort of exhaust leak.

Paul

--- In dmcnews@xxxxxxxxxxxxxxx, "David Teitelbaum" <jtrealty@...> 
wrote:
>
> Well, that was clever! The noise is normal. On some cars it is more
> pronounced than others and under certain driving conditions it can 
be
> more or less. What is the variable here is the decel valves in the
> throttle plates. Make sure they are not stuck and they move easily 
on
> the springs. Much more important on a 5-speed than an automatic. 
What
> is happenning is when you slam the throttle valves shut the mixture
> goes rich for an instant until the mixture unit can catch up. 
During
> that instant a slug of over-rich air/fuel goes through the motor 
and
> some of it burns in the exhaust. Most noticeable when you are 
driving
> down a hill and you lift your foot off the gas quickly. Exhaust 
leaks
> can also make the noise worse by letting air into the exhaust to 
help
> the burn and then letting the noise out.
> David Teitelbaum
> vin 10757
> 
> 
> 
> --- In dmcnews@xxxxxxxxxxxxxxx, Ryan Wright <ryanpwright@> wrote:
> >
> > Hi David,
> > 
> > On 2/6/06, David Teitelbaum <jtrealty@> wrote:
> > > Hard to tell what you noise is this far away!
> > 
> > How about if I bring the noise to you?? :)
> > http://www.ryanwright.com/tmp/dglug.mp3
> > 
> > Notes:
> > 
> > 1. It doesn't happen when the car is cold (REALLY cold; within 
30-60
> > seconds of startup I'm OK, after that the noise shows up).
> > 
> > 2. It only happens on deceleration.
> > 
> > 3. It's much more pronounced when the idle switch is engaged. If 
I
> > decelerate without hitting the idle switch, it's virtually
> > non-existant.
> > 
> > 4. The noise is worse now that I've got the Lambda system working
> > correctly. Go figure?! :)
> > 
> > 5. If I dial the mixture rich (way rich, at least 1/2+ turn 
beyond
> > where the Lambda system gives up trying to regulate things), the 
n
>








To address comments privately to the moderating team, please address:
moderators@xxxxxxxxxxx

For more info on the list, tech articles, cars for sale see www.dmcnews.com

To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/dmcnews/

<*> To unsubscribe from this group, send an email to:
    dmcnews-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/
 




Home Back to the Home of PROJECT VIXEN


Copyright 2006 ProjectVixen.com.  All rights reserved.

Opinions expressed in posts reflect the views of their respective authors.
DMCForum Mailing List Archive  DMCNews Mailing List Archive  DMC-UK Mailing List Archive