[Mercedes] [W124] RE: '93 320CE Intermittent Starting Problem (UPDATE)

[Gibbons, Paul]

Well, I'm a little bit further on, but not much....

Turns out it's the lack of spark that's the problem.

Trying to stitch together the wiring diagrams form the CD takes ages, but
one thing I did conclude, there are probably a dozen or so sensors,
connections etc that could stop the engine management system sparking if
they packed-up...... 

I'm sure the engine management system knows better than me what the problem
is, does anyone know how to read the fault codes?

Thanks for the advice about the fuses, but I've put a meter on them, and
even replaced them, but still no spark.

Just to remind anyone interested, whilst I'm staring at the engine
scratching my head, it's just as likely to start perfectly in the time it
takes me to make a cup of tea....... That means all troubleshooting is over
for the day. Can't fix what's not broken.

Sure enough, it'll fail to spark next time when you most need it. 


-----Original Message-----
From: Alec Cordova [mailto:benzaholic at gmail.com]
Sent: Wednesday, May 10, 2006 7:18 PM
To: w124list at mbcoupes.com; mercedes at mercedesmailinglist.com
Subject: Re: [Mercedes] [W124] RE: Intermittent Starting Problem


And even on a 93, I believe the fuel pumps are mounted near the right
rear tire, although if I pay attention, I can usually hear mine when I
start my 89.

Alec Cordova
Taylor, Texas
89 300CE, 203K
fuel pumps replaced a year or two ago

On 5/10/06, Declan Mc Dermott <decmcdermott at hotmail.com> wrote:
> Hi Paul,
>
> Check if you can hear the fuel pump run when you switch on the ignition.
If
> not the fuel pump may be sticking. They can operate intermittantly when
they
> are on the way out.
>
> Regards,
> Dec.
>
>
> >From: "Gibbons, Paul" <Paul.Gibbons at uk.thalesgroup.com>
> >Reply-To: W124 CE Coupes and Convertibles <w124list at mbcoupes.com>
> >To: mercedes at mercedesmailinglist.com
> >CC: w124list at mbcoupes.com
> >Subject: [W124] RE: [Mercedes] Intermittent Starting Problem
> >Date: Wed, 10 May 2006 16:12:21 +0100
> >
> >Guys,
> >
> >On my '93 320CE, I often get a no start situation, other times it's
fine...
> >
> >Symptoms are that starter will spin normally, but no fire whatsoever.
I've
> >tried pushing the accelerator to the floor (in case it was flooded), but
no
> >luck. Try say a dozen times and give up before I flatten the battery.
Come
> >back 1/2 hour later, it starts first time (but sometimes doesn't)
> >
> >The temperature (of the weather, or the engine ) seemingly doesn't make
any
> >difference, it's the same cliff-hanger hot or cold......
> >
> >Hope I'm describing something that has happened to other members and they
> >have found a cure ?
> >
> >If not, I guess I'll have to start a thorough diagnosis the hard way.....
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>
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