[Howard H]

First ----- Thanks for the responses.

Second --- The plug wires could be shielded, but since they're a set, I would think that the center (common) wire would also be shielded. The pick-up works fine when connected to this one. Marc-Andre, unfortunately the #2, #3 and #4 wires dont give me any signals either.

Finally --- I called the tech support desk at Crane again, and the guy suggested that I increase my plug gap to .045" because the smaller gap may not be allowing the tach enough time to see the pulse. I didn't understand it, but I did it, and the car seems to run ok, but still no tach.

Even though the answer probably won't cure my tachometer issue, does anyone know what determines the proper spark plug gap for a given ignition system? I know that because I "upgraded" my system there should be more voltage to allow the spark to jump across a wider gap, but going from .028" to .045" is a 60% increase. Are spark plug gap dimensions really so arbitrary?

Thanks again for any responses.

Howard