1984 4k - no start
Huw Powell
audi at humanspeakers.com
Sat Aug 8 18:21:56 PDT 2009
> I cleaned up the grounds - put 2 new grounds in, one direct from the
> batt to the valve cover and one from the valve cover to the body up
> front.
And I think you said you ran a big one from battery to block. That's
the one that works the starter motor.
> Started, ran better - but still had a very slight hesitation when
> cruising. So I thought I'd clean up the contacts on the coil its self -
> busted one of the posts :( - but I had a new coil that I had bought and
> had tested with.
You bought a coil when so many of us have boxes of old good parts?
Heck, I think I put an Audi coil on my '57 Trojan loader! OK, no, I
only used an Audi coil bracket.
> The new coil had a slightly different set of posts for the (-) neg side
> - so I switched them.
Yeah, I've seen that.
> Now I have no-start again...so I thought, let me see if I'm getting
> anything to the distributor - I don't really understand how the power
> flows to the/from the coil/distributor - but I thought that if I put a
> test light on the wire that goes to the distributor I'd see it light up
> - I don't.
Ignition is pretty simple, really. 12v to coil, builds field in primary
winding. Then transistor (or points.... sorry) ground the primary,
sending 12-30,000 volts out the secondary to the distributor and
hopefully at the same time to a spark plug.
Basic coil test is to measure the two resistances (pri and sec). If
they are in spec, coil is good.
--
Huw Powell
http://www.humanspeakers.com/audi
http://www.humanthoughts.org/
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