Quote:
Originally Posted by HarryD
If you put an ohm meter across the point and crank the car, does the meter go from 0 to infinite ohms? Report findings.
If the points indeed opening and closing (see above), then you have a bad signal wire from the points to the CDI, a failed CDI, a bad signal from the CDI to the Coil or a bad coil.
Coil: Measure the resistance/continuity between the two outer terminals on the coil and between each of the outer terminals and the high tension tower in the middle of the coil. Report findings. Per the Porsche Factory manual the CDI puts out about 400v. The coil Primary resistance should be 0.4 to 0.6 ohms, and the secondary is 650 to 790 ohms.
Check continuity of the wire between the points and the plug that connects to the CDI. Center is power. On one side is the wire to the points and on the other is the wire to the coil. Report findings.
... until this is addressed the rest of the tests are meaningless.
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One more question, When you say, "check continuity of the wire between the points and the plug that connects to the CDI" do you mean the wire that goes from CDI plug terminal and connects to the outside of the distributor (along with the tach wire) or from the CDI plug terminal to inside the distributor on the points themselves. i.e do I need to pull off the cap and rotor and touch the points somewhere in the distributor? If so where on the points do I put the multimeter probe? I am learning to use a multimeter but am definitely not an expert. Thx