[Grady Clay]

Rich,

I recommend doing some more diagnostics before you tear into anything.

A few questions: Does the tach ‘act up’ when the problem exists? That can be dirty or incorrectly set ignition points.

Temporarily plumb your fuel pressure gauge to the cockpit. Note the fuel pressure while the problem is happening. I’ll second Dennis’ (Pelican gulf908) fuel observation. These can be symptoms of a restricted fuel screen filter at the outlet fitting in the fuel tank. At the transition from working to blocked it is intermittent and load sensitive. Turning the car off for a few minutes makes it work again for a bit (particularly if it has had a trip on a flatbead).

Another test is to wire an analog voltmeter to the 12V power wire to the CDI. You are looking for ‘flickering’ indication of the voltage. Poor connections at the battery, fuse block or ignition switch are common culprits.

You want to find the actual problem and know that it is fixed – not just have it go away and return later.

Best,
Grady