Re: Hello and help!

["Michael J. Saccucci" <saccucci@cs.lmco.com>]

David Anderson wrote:
> 
> On Jul 10,  8:47am, Michael J. Saccucci wrote:
> > Subject: Hello and help!
> > Hey everyone,  My name is Mike and I currently own a 1995 Jetta GLX with
> > approximately 60K miles and I am experiencing stalling problems after
> > high speed/highway runs. Anytime I come to an immediate stop after the
> > highway run the engine will idle high - anywhere from 750 - 1500 rpm -
> > for several seconds, then it will often stall.
> 
> OK, This is just a guess, not from any experience that I've had with VW's, but
> just knowing what I know about cars in general....
> 
> Would it be possible that your EGR valve is sticking open?  On some cars, when
> they're idling, you can open up the EGR valve with your hands.  And when you
> do, the car stalls.  (Unfortunately, I don't think you can do that on the
> GLX's.)
> 
> The EGR valve is supposed to open at higher engine speeds, to let some inert
> exhaust gasses into the intake, to cool combustion temperatures, to reduce NOx
> emissions.  So, maybe while you're cruising at highways speeds, the EGR valve
> is open (like it's supposed to be), and everything is fine.  But when you stop,
> and the engine speed goes to idle, the EGR valve should shut off.  Maybe if
> it's staying open, that's causing it do stall?  This could be a problem with
> either the EGR valve itself, or the EGR solenoid, which controls the amount of
> vacuum to the valve, allowing it to open/close.
> 
> Your Bentley's manual should have some info about this...
> 
> Like I said:  Just a guess!
> 
> Dave
> anderson@msai.mea.com
Dave,  Thanks for the input.  I will explore this possibility and get
back to you with the results.  Thanks Again!  -Mike