[W126 Coupe] 1- doesn't start in cold 2 - oil pressure strange

[Jim]

Stright to 3 when I switch ignition on and will not move until ignition is
off. then its straight to zero.
Just replaced oil, filter and sender unit so I think its a bad electric
connector.
James
Down Under
----- Original Message -----
From: "Shayegan, Richard" <rishayegan at davidson.edu>
To: "Mercedes Coupes Mailing Lists" <mbcoupes at mbcoupes.com>
Sent: Monday, January 24, 2005 11:37 PM
Subject: RE: [W126 Coupe] 1- doesn't start in cold 2 - oil pressure strange


> Mine will stay up at three sometimes, but I don't think it's because of
> a gauge fault. I don't know how to solve your problem, but speaking of
> gauges, what does your oil pressure do when you have the ignition, not
> the engine, but just the ignition on? Mine goes up a tiny bit from 0,
> and if I watch it closely for a little while I'll notice it twitches
> slightly periodically.
> Richard
>
> -----Original Message-----
> From: mbcoupes-bounces at mbcoupes.com
> [mailto:mbcoupes-bounces at mbcoupes.com] On Behalf Of Jim
> Sent: Monday, January 24, 2005 1:18 AM
> To: Mercedes Coupes Mailing Lists
> Subject: Re: [W126 Coupe] 1- doesn't start in cold 2 - oil pressure
> strange
>
> Talbir
> Mine is a 84 500SEC EURO
>       My oil pressure gauge has been reading full on 3 for some time .
> As
> soon as i start up , it shoots up to three and stays there !!!
>   Replaced the sender unit yesterday ,but, the electrial connecting plug
> had
> a problem.  Opened the cover and discovered 2 loose wires, one short bit
> on
> the oil plunger and the other going to the dash but not connected to
> each
> other.  Can this be repaired ? if not is there a part number for this
> connector. And ,or, does it have a name?
>  Tried joining the 2 wires. Result-  oil pressure goes to three and
> stayes
> there.
> P.S.
>    I change the oil and filter every 3,000 miles.
> Regards
>  James
>  Down Under
> -----
>
> > Richard,
> >
> > Either the cold start sensor (4-pole switch) on the inlet manifold is
> not
> > functioning correctly or you have a weak battery, which in turn is not
> able
> > to support the cold start system components.
> >
> > As for the oil sender, may just be dirty oil. Try changing the oil and
> oil
> > filter and check again.
> >
> >
> > talbir
> >
> >
> >
> >
> >
> L.L.C.
>
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>
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