timing lamp on ECU car - wire connection to earth ?

Hi,

Excuse me for checking this beforehand on the forum.

When checking timing marks with a lamp, one said to me there should be a
wire from the harness connected to earth/ground to ensure a fixed advance,
which can then be adjusted. This distributor is still manually adjustable.

Can I believe this ? This connector is rather special, having a very thin
metal pin and a plastic pin protruding next to it. So I guess this connector
is meant for some factory- specific tester.

But I can believe this to be a common feature on some ECU cars.

Anyone has experience with this ?

Thanks in advance,

Carl

Sorry,

Forgot to say crankshaft and camshaft angle/position sensor are incorporated
in distributor. So injection timing is changed with this distributor setting
as well. I think more reason to check it fysically ...

Thanks,

Carl

You really should say what kind of car and engine and age. There are
tons of 'new' ways to time a vehicle these days including a lot that
cannot be adjusted.

Some of those 'unused' grounds are just for high altitude running.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's


carl wrote:
>
> Hi,
>
> Excuse me for checking this beforehand on the forum.
>
> When checking timing marks with a lamp, one said to me there should be a
> wire from the harness connected to earth/ground to ensure a fixed advance,
> which can then be adjusted. This distributor is still manually adjustable.
>
> Can I believe this ? This connector is rather special, having a very thin
> metal pin and a plastic pin protruding next to it. So I guess this connector
> is meant for some factory- specific tester.
>
> But I can believe this to be a common feature on some ECU cars.
>
> Anyone has experience with this ?
>
> Thanks in advance,
>
> Carl

Hi Mike&all,

and sorry. It is a Mitsubishi Space Star 1.3 '99. Meanwhile I received
confirmation
from an ex-mechanic salesman. This brown/black wire is meant indeed to fix
advance ignition to a value
used for adjustment. Just is tricky that the connector looked too special to
be used just for grounding.

FYI there is on this car also a blue fuel pump engine override connector for
emptying the tank.

Carl

...."Mike Romain" > schreef in bericht
...
> You really should say what kind of car and engine and age. There are
> tons of 'new' ways to time a vehicle these days including a lot that
> cannot be adjusted.
>
> Some of those 'unused' grounds are just for high altitude running.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
>
>
> carl wrote:
> >
> > Hi,
> >
> > Excuse me for checking this beforehand on the forum.
> >
> > When checking timing marks with a lamp, one said to me there should be a
> > wire from the harness connected to earth/ground to ensure a fixed
advance,
> > which can then be adjusted. This distributor is still manually
adjustable.
> >
> > Can I believe this ? This connector is rather special, having a very
thin
> > metal pin and a plastic pin protruding next to it. So I guess this
connector
> > is meant for some factory- specific tester.
> >
> > But I can believe this to be a common feature on some ECU cars.
> >
> > Anyone has experience with this ?
> >
> > Thanks in advance,
> >
> > Carl