[W126 Coupe] Throttle body wiring question

[Sharan Bains]

Ian

The central pin is a ground pin - the throttle switch basically works as 
follows : provides a ground signal at full throttle to indicate this and 
likewise for zero throttle.

So it is likely that the central pin missing on the 500 wiring needs to be a 
ground signal.

Any reason why you haven't transferred the CIS-KE injections system and 
ignition system over ?

You won't get the power output that you should without the correct CIS and 
ignition modules in place.

The CIS/ignition loom is quite involved but it is a fairly straightforward 
plug and play device (with several plugs of course !). Removing the wiring 
is the difficult parts, especialy in the region where the wiring runs behind 
the heater hoses under the wiper motor area.

I'd really reccomend transferring the wiring/modules across if it's 
increased power you are looking for.



talbir


>From: "Ian Gatenby" <igatenby at optushome.com.au>
>Reply-To: Mercedes Coupes Mailing Lists <mbcoupes at mbcoupes.com>
>To: "'Mercedes Coupes Mailing Lists'" <mbcoupes at mbcoupes.com>
>Subject: RE: [W126 Coupe] Throttle body wiring question
>Date: Sat, 29 Apr 2006 13:23:28 +1000
>
>
>
>I've almost completed the installation of an '87 Euro 560 engine into my 
>'83
>500 SEC.  In doing this, I have used the 500 wiring - and consequently the
>500 fuel system on top of the engine.  One thing I missed was the 
>difference
>between the two engines with the wiring of the switch on the throttle - it
>appears to be a position sensing device.  The 500 has two wires and the 560
>has three wires.
>
>
>
>Does anyone know whether I can use just two of the three - and if so, which
>two - or do I need to swap the throttle valve (a major task at this stage)?
>
>
>
>Regards
>
>Ian
>
>
>
>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.