Engine start up, Problem 3: Weak Starter Options

[OU8AVW]

I'm working through starting my freshly rebuilt 2056. It has the original D-Jet and is a 1975 motor. At first I had no fuel pump, I fixed that.

Now there is no spark from the coil. I traced the lead from #8 on the fuse box to the relay board then out the relay board. I have 12.4v at the coil positive but no spark. I'm testing it with a light-type tester. No bueno.... It is a Bosch coil, i believe it is a "blue" coil.

I read here that there should be 1.5 ohms resistance between the two poles on the coil with everything dissconnected. This one tests at 7.4 ohms. A spare coil I had had similar results with no spark at crank and 4.6 ohms resistance.

I assume i need a new coil......
Right?

[stugray]

Here is a quick test:

Unhook the lead from the coil output terminal (the BIG one) to the dist.
Hook a sparkplug wire with a spare plug into the coil output terminal.
Lay the plug on the top of the engine.
Turn on the ignition.
Crank the engine.

Is there a spark?
If no, then it is the points OR the coil.
If Yes, then the points & coil are at least working (doesnt mean they are great).

To elimiate the coil as the problem.
Leave everything hooked up as above, but unhook the wire that goes from the coil to the distributor (points).
Turn on the ignition.
If you have a Voltage meter, check the ignition input terminal on the coil - it should have battery Voltage (~12.5 Volts).

Check the terminal that you just pulled the wire off of.
It should have the same voltage as the ignition input.

Now briefly SHORT that terminal (the one the wire to the points was connected to ) to the engine case.
There should be a spark when you touch the wire to the case.
When you UN-short that wire from the case, you should have a spark from the plug.

The above tests take the distributor out of the picture to simplify the tests.

HTH