Spark should be a real crack and bright blue.
The timing light can be connected anywhere in the HT circuit [High
Tension] and the other end of the light can be either earthed [grounded]
or connected to the next point in the circuit.
e.g. lift a plug lead and the TL connects between the plug and the lead,
lift the centre cap lead and connect the TL between the cap terminal and
the lead etc.
Grounding the TL will render the HT circuit incomplete from the engine's
point of view whereas putting the TL in series with the components will
allow the engine to continue running, if it has no other issues :-(
Regards,
Graeme Suckling
http://tinyurl.com/6n5aza
Adelaide
South Australia.
On 11/12/2012 7:32 AM, Roy Haslett wrote:
> OK,
> I pulled the coil wire off the cap and arced to the valve cover nut.
> Spark- Yes, but it doesn't look very good. Color is white to
> yellow/orange. Shouldn't I get a nice big blue arc?
>
> ------------------------------------------------------------------------
> *From:* Linda J <ljordan704@netscape.net>
> *To:* Graeme Suckling <graemes@internode.on.net>
> *Cc:* "datsun-roadsters@autox.team.net" <datsun-roadsters@autox.team.net>
> *Sent:* Monday, December 10, 2012 9:02 AM
> *Subject:* Re: [Roadsters] 1600 tuning issues
>
> Graeme
> With the timing light, would you just connect the coil wire as it
> comes out of
> the cap?
>
> Linda
>
> Sent from my iPod
>
> On Dec 10, 2012, at 2:59 AM, Graeme Suckling <graemes@internode.on.net
> wrote:
>
> > Something I purchased recently on ebay are a set of four spark
> indicators.
> > They fit in series with the spark lead and the spark plug and glow every
> > time that cylinder gets a spark pulse.
> > You can use a timing light exactly the same way, albeit one cylinder at
> > a time to check for a fat healthy spark.
> > You can also connect a timing light to the centre post of the either the
> > coil or the distributor cap to check for spark integrity.
> > Unless your carb. bowls are draining causing a fuel starvation problem
> > at start up, I would advise checking spark.
> > Whatever you do, be methodical and new parts do go faulty so don't
> > ignore those in your diagnosis.
> > Good luck!
> >
> > Regards,
> > Graeme Suckling
> > http://tinyurl.com/6n5aza
> > Adelaide
> > South Australia.
> > ________________________________________
> >
> >
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> t
> ________________________________________
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