[W126 Coupe] SEC Starting Failure After a Massive Downpour

Tue Aug 16 18:03:28 EDT 2005

Alexhead,

Regarding the fuel pressure problem: There is a check
valve on the output of each fuel pump that could have
some debris stuck in one or both of them. Rusty sells
them.

There is also the fuel accumulator that could be
leaking. To check it, clamp off the rubber hose from
the accumulator to the fuel tank, then disconnect it
from the accumulator. Once it's off, turn the key on a
few times to get the fuel pressure up. If you get any
fuel out of the open side of the accumulater then it
must be replaced. 

If the above items are ok, then you may have a problem
with the fuel distributer, of the fuel injectors.

Bob C.

--- Richard Hogarth <R_Hogarth at Foundrycove.com> wrote:

> Dick,
> Wow, You are describing what happened to me exactly
> (!) about 4 months ago.-
> Including the rain! 
> I also had bosch plugs but plat 2's although that
> was not the issue. I was
> getting spark but it was totally erratic on 4 of the
> 8 cyl.  I replaced the
> cap, rotor, wires, fuel filter and no luck. 
> I guessed and took a leap and  bought a used spark
> control unit on ebay,
> plugged it in and my 560 has been fine ever since.
> (although now I have a
> new fuel pressure leak down problem)
> When my 560 sits for more than about 1hr, I have to
> repeatedly engage the
> key to pressurize the fuel system. Any ideas?
> -Axlehead
>  
> 
> -----Original Message-----
> From: mbcoupes-bounces at mbcoupes.com
> [mailto:mbcoupes-bounces at mbcoupes.com]
> On Behalf Of Dick Spellman
> Sent: Saturday, August 13, 2005 9:19 PM
> To: figstir at yahoo.com; Mercedes Coupes Mailing Lists
> Subject: Re: [W126 Coupe] SEC Starting Failure After
> a Massive Downpour
> 
> Well based on what you describe you do have a wiring
> harness issue.  It's
> very likely that your ignition wire set is the
> problem and if you get no
> start at all I'd be highly suspect of the coil to
> tower wire.  You might
> start with replacing that wire with a known working
> one.
> 
> In any event, I'd lose the Platinum plugs that the
> local auto parts store
> pushes, they are not recommended by MB.  I'd make
> sure the new original
> equipment set are gapped properly.  The archives
> have lot's of info on the
> Platinum +4 and the problems you will create for
> your self with those plugs
> installed.
> 
> Just my 2 cents.
> 
> Dick
> ----- Original Message -----
> From: "a figment of the imagination"
> <figstir at yahoo.com>
> To: <mbcoupes at mbcoupes.com>
> Sent: Saturday, August 13, 2005 9:46 PM
> Subject: Re: [W126 Coupe] SEC Starting Failure After
> a Massive Downpour
> 
> 
> > Hi all,
> >
> > Well, I got cooled off yesterday when Nature
> brought
> > to me and the nearby world a torrential rain storm
> > that flooded the roads and drenched my SEC.
> >
> > Well, it was simply parked in the parking lot the
> > whole time.  After leaving work, I tried to start
> it,
> > but with no luck.  The engine turned over and for
> > about 10 secs the engine ran but then died.  It
> did
> > this two more times until my battery was
> thoroughly
> > drained (it was low to begin with).
> >
> > After getting my battery recharged at Autozone, I
> > tried to start the engine again, but without any
> luck.
> >  I tried jumping it with the help of others 3X,
> but
> > only to be left with a cold cranking turning
> engine
> > but no start.  I then bought some more gasoline
> and
> > filled the tank to 1/2 full (it was near reserve
> to
> > begin with).  I threw in some Gumout Fuel Injector
> > cleaner in there, as well to see if it could help
> > clean out any injector based source of the
> problem,
> > but both of these procedures failed to start the
> car
> > as well.
> >
> > I then bought a new battery, but that failed. 
> Next, I
> > bought some Pyrroil brand Starter Fluid and
> sprayed it
> > up into the air intake, but still no luck.  I
> checked
> > the dizzy cap and rotor points: all were good
> after a
> > little scraping of some carbon.
> >
> > I was left stranded all night and only this
> morning
> > was able to get a wench truck to tow me home.
> >
> > Right now, I'm working on replacing the fuel
> filter
> > but after pulling this off, I don't think this
> will
> > fix my problem.  My fuel pump checked out as
> working
> > after directly connecting it to a 12-volt battery
> at
> > the auto parts store.
> >
> > The only thing I haven't done is check if the
> coils
> > are creating a spark.  (BTW, I replaced my spark
> plugs
> > with Bosch Platinum about 1 month ago).....so I'm
> left
> > without any ideas about how to get my SEC going
> > again.......
> >
> > Is there any possibility that water got into the
> fuel
> > system or that water did something to keep my car
> from
> > starting?
> >
> > -figment of Friday the 13th, ugh!
> >
> >
> > P.S.  I have owned this car for 4 months now
> (during
> > which time I have completely rebuilt it) and have
> had
> > a similar problem after driving through flooded
> > streets in a similar downpour in June.  Back then,
> I
> > replaced the battery and waited until the
> temperatures
> > rose to 70 F, before it would turnover and start.
> >
> >
> >
> >
> >
> >
> >
> >
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> >
> 
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> 
> 
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> 

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