[W126 Coupe] Strange Fault (& fix)

[Jay Febish]

Don't worry Vance, Attila will have a few brews for anyone for any reason! ;-) Attila, when're you going to get down here to Sarasota? The MarVista is probably in danger of going out of business without you and Mikey D...
Jay

On Jun 11, 2011, at 11:28 PM, Vance Rowley wrote:

Hi Attila,
 
 Thanks for the fast reply and advice. I will check and let you know the results (when I get round to it).
Quite a coincidence, I used to live in Florida, but that was 4 years before my 560 was built when I used to drive around in a monster of a 7.5L Lincoln Continental which did as much as 8 miles to the gallon. (but who cared  back then?).
Great times back then. Makes me wish I was back there. Have one for me.
 
Cheers,
 
Vance.
 
From: attila13 at bellsouth.net
To: vance.rowley at thestart.eu; mbcoupes at mbcoupes.com
Date: Sat, 11 Jun 2011 22:56:32 -0400
Subject: Re: [W126 Coupe] Strange Fault (& fix)

                There is no co-relation between the two.  Check the vacuum line from the
brake-booster to the intake manifold (lower plenum).  Great big plastic
thingy.  If that is good, put vacuum gauge on main vacuum line and see if
it holds.  Yours very drunk in Florida.  If the car was here, I could find it in
no time flat. Sayonara.
 
From: mbcoupes-bounces at mbcoupes.com [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Vance Rowley
Sent: Saturday, June 11, 2011 10:33 PM
To: mbcoupes at mbcoupes.com
Subject: [W126 Coupe] Strange Fault (& fix)

 
Over the years, I have had (and heard of) some strange faults on these wonderful cars. But I can't work this one out.
Here is what happened.
I was driving into town one night (about 8 miles from home) when it started to rain. As you would expect, I turned on the wipers. They worked for about 30 seconds, then "poof" they stopped just as I was coming up to a red light. I hit the brake pedal, and it just sank to the floor. Luckily, I had already slowed down considerably before braking, so with a few pumps on the pedal I managed to stop OK.
To cut a long story short. Driving very carefully and quite a bit of pumping of the brakes, I managed to get to my destination and was also lucky the rain stopped for my return journey home.
Next day, I checked the fuses, and as expected, the fuse that powers the wipers had gone. I replaced it with a new one, and hey presto, they worked perfectly. (Nothing strange there I hear you say). I then thought, now to get to the brake problem. So jumped in the car and set off to my local garage I use for service and repairs (when I can't be bothered to do it myself). As I came up to the first junction at the end of my road, I hit the brake pedal and nearly went through the windscreen. I then did a few tests up and down my own street and managed to stop on a dime every time. The brakes worked perfectly with no sign of the pedal sinking to the floor. So I cancelled my visit to my local garage and nearly 3 months later everything is still perfect.
Now I can understand the fuse for the wipers going on a 1991 car, especially as I don't use it that much these days, but can anyone explain to me how the hell can replacing the fuse for the wipers fix my brake problem as well at the same time. I just can't work this one out.
If anyone has any ideas or recommendations, I would love to hear from you.
Yours very confused,
Vance
1991 560 SEC Euro.

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