Opel/Vauxhall's unconnected socket in the engine bay

[Alexander Wenning]

martin at mgass.demon.co.uk schrieb:
> Re: Alexander's Notes on Unconnected sockets in engine bay.
>
> Would this plug also be there for a XE20 16V Vectra and Omega with 
> SimTec 56.X ECU ?

Yes, it is. I own a Vectra B 2.0l 16V (model 1997) and a Tigra 1.6 16V (model 
1996). Both have these connectors. I´ll have a look at my cars and tell you 
exactly the position after christmas.

> With standard CAT and ECU settings would you consider these engines 
> to run rich or lean in most conditions ? 

They are too rich at full throttle and a lean mixture gains some horsepower from 
the engine. Our technicians have already tried by changing the maps.

> Also would it be necessary to remove the CAT so 
> as not damage it, by moving away form Lambda 1, to fully exploit the
>  potential ?

We can´t remove the cat in Germany. Therefor we change the response time of the 
lambda sensor in the eprom. After accelerating hard with a lean mixture it gets 
rich again in order to cool the cat.

> p.s. Any experience of Diacom S/W and connectors with XE20 engines and 
> SimTec ECUs ?

What the hell is Diacom s/w???

Merry Christmas and a happy new year!

Alex Wenning, Wenning Motorsport