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reachme reachme is offline
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Join Date: Oct 2012
Location: MA
Posts: 672
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Use the probe only as a quick test for power, then a voltmeter/ohmmeter for accuracy/consistency of signal. You are doing the opposite, don't expect consistency from the probe chirping.

With voltmeter inline and key at position 1, turn the engine clockwise like it says above and you should see that 12v on the voltmeter go to 0, then back to 12v as the engine keeps turning.

See as you turn the engine you also turn the distributor. When the distributor is lined up it signals the CDI on that wire you are seeing 12v. The CDI then begins sending power to the coil. The coil multiplies that which goes shooting out of the coil, into the center of the distributor which distributes it to the correct wire leading to a spark plug which sparks at exactly the right time in the cycle for ignition on that cylinder.

What you want to do is force a state change on that trigger line to make sure CDI is getting the trigger. That is CDI's input

If that is OK then test CDI output. CDI->coil->distributor->sparkplug connection.

Put the probe down, it's confusing

Good luck!
Old 07-02-2017, 09:17 PM
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