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Re: Timing fluctuating
That arcing is a mystery. I'm trying to think about it. I have had engines before that were not grounded to the frame and had problems, but it's a different problem. One where the only ground is the fuel line and it gets hot and percolates the fuel.
Are you actually seeing the arc or a reflection of the arc on the shiny parts? Could it be that a bad cap or wires are arcing and you're seeing the other parts light up rather than seeing the actual zap?
Now I'm grabbing at straws... Could it be that you have a varnish or carbon deposit that is is so strong it insulates the distributor body from the manifold?
Could it be two different problems?
When I hear that timing is fluctuating my immediate gut response is mostly timing chain (or distributor gear?). But if those parts are new we can probably rule that out.
Keep us posted.
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