[W126 Coupe] Vacuum problem? Got the car running! Like Shit!

[David Fatovic]

Here is an update.  I found that vacuum line, and it
seems to be good.  Here is something interesting
though.

When I replaced the plugs, plug wires and ignition
module, we also replaced the rotor.  The tip of the
rotor was burned back about 1/16 of an inch.  So now
new rotor, new plugs, new plug wires, and new ignition
module.  

I pulled the cap off on Saturday and noticed the brand
new rotor tip was badly burned!  I can't figure out
why this happened, but the tip of the rotor is all
burned up.  Car is still running, but running like dog
shit.  The cap looks fine, no cracks, no chips, no
bends, no black streak marks, etc.  

Any ideas?

David

--- Eddie <cyberdrakon at hotmail.com> wrote:

> It's at the very back of the engine, slightly on the
> passenger side.  One
> line goes around the right side of the engine and
> goes through the firewall
> right in front of the fusebox, and the other one
> goes under the car towards
> the transmission.
> 
> Of course your problem maybe a different vacuum
> leak, but the symptoms are
> identical (stumbling, stalling feel with AC,
> etcetera..).
> 
> Eddie
> 
> -----Original Message-----
> From: mbcoupes-bounces at mbcoupes.com
> [mailto:mbcoupes-bounces at mbcoupes.com]
> On Behalf Of Eddie
> Sent: Sunday, July 10, 2005 3:14 AM
> To: 'Mercedes Coupes Mailing Lists'
> Subject: RE: [W126 Coupe] Vacuum problem? Got the
> car running!
> 
> Give the 2 rear vacuum lines a light tug (going to
> the tranny and around the
> engine).  I have the same problem, and replacing the
> vacuum line improved
> the idle SIGNIFICANTLY.  When I went to tug it, it
> simply snapped right off.
> I would say it's almost cured.  I was thinking about
> ignition problems too,
> but I discovered there was a crack on that vacuum
> line where it sits against
> the transmission.  I think it's the friction and
> heat that cracked it,
> perhaps you have the same problem?  It didn't show
> up when testing vacuum
> elsewhere.
> 
> BTW, I'd like to thank Mike Ramay, Nathan, and
> Jonathon Hodgman, they've
> helped me quite a bit off-line with my rough idle. 
> It's NEARLY cured.
> 
> Eddie
> 
> -----Original Message-----
> From: mbcoupes-bounces at mbcoupes.com
> [mailto:mbcoupes-bounces at mbcoupes.com]
> On Behalf Of David Fatovic
> Sent: Saturday, July 09, 2005 4:07 PM
> To: Mercedes Coupes Mailing Lists
> Subject: Re: [W126 Coupe] Vacuum problem? Got the
> car running!
> 
> Well, today I was able to get the SEL running.  I
> switched out the ignition module from my 85 SEC to
> the
> 85 SEL.  Fired right up!  So I got that running,
> changed the oil, new plugs, new plug wires, tranny
> fluid and filter change.  It is running, it does
> have
> more power, but it still has the stumble under load
> at
> low RPM.  
> 
> Basically the car stutters, and with the AC on it
> almost feels like when you are stepping on the gas
> from a dead start, like it is just going to stall.  
> 
> Any ideas?  At highway speeds when you step on the
> gas, it goes like it should, at cuising speeds the
> car
> feels fine.
> 
> any ideas?
> 
> david
> 
> --- Mister McGoo <eelploot at hotmail.com> wrote:
> 
> 
> ---------------------------------
> 
> A replacement for the Bosch ignition module (02 545
> 26
> 32) for models prior to '86 is made in Germany by
> Hueco at approx $150.
> 
>  
> 
> 
> 
> >From: jralex at ix.netcom.com
> >Reply-To: jralex at ix.netcom.com,Mercedes Coupes
> Mailing Lists <mbcoupes at mbcoupes.com>
> >To: Mercedes Coupes Mailing Lists
> <mbcoupes at mbcoupes.com>
> >Subject: Re: [W126 Coupe] Vacuum problem?
> >Date: Wed, 6 Jul 2005 23:28:53 -0500 (GMT-05:00)
> >
> >The MB Coupes Website!
> >W126 SEC Mailing List
> >Postings remain property of MB Coupes, L.L.C.
> 
> 
> 
> ---------------------------------
> Content-Type: text/html;
> charset=us-asciiContent-Transfer-Encoding: 7bitA
> much
> better ignition system and for less money is the
> MSD.
> Check archives. Nathang has some great write ups
> about
> it. Jim Alex
> 
> 
> -----Original Message----- 
> From: Mister McGoo 
> Sent: Jul 6, 2005 11:54 AM 
> To: mbcoupes at mbcoupes.com 
> Subject: Re: [W126 Coupe] Vacuum problem? 
> 
> 
> David;
> 
> A quick way to see if you have any spark, and seeing
> as you obviously already have the air cleaner off,
> is
> to sqirt starting fluid or a couple tablespoon of
> gas
> through the air intake and see if it fires up (for a
> second or two)
> 
> You're likely right about the coil.  The symptoms
> are
> closer, they  can act up first and then fail.
> 
> The other option is the ignition module but they
> usually die instantly with no warning.  
> 
> A new coil is by far the cheapest part, abt $75. 
> The
> ign module is more like $500.  The one in an '89SEC
> is
> over $1,500. ouch!
> 
> 
> 
> 
> >From: David Fatovic <coloradocroat at yahoo.com>
> >Reply-To: Mercedes Coupes Mailing Lists
> <mbcoupes at mbcoupes.com>
> >To: Mercedes Coupes Mailing Lists
> <mbcoupes at mbcoupes.com>
> >Subject: Re: [W126 Coupe] Vacuum problem?
> >Date: Wed, 6 Jul 2005 05:01:45 -0700 (PDT)
> >
> >We put a spark tester on a few of the wires, it
> will
> >show the spark through the cable.  Nothing.
> >
> >David
> 
> 
> 
> > The MB Coupes Website!
> > W126 SEC Mailing List
> > Postings remain property of MB Coupes, L.L.C.
> 
> The MB Coupes Website!
> W126 SEC Mailing List
> Postings remain property of MB Coupes, L.L.C.
> The MB Coupes Website!
> W126 SEC Mailing List
> Postings remain property of MB Coupes, L.L.C.
> The MB Coupes Website!
> W126 SEC Mailing List
> Postings remain property of MB Coupes, L.L.C.
>