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Old 09-09-2024, 12:15 AM   #30
drolston
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Join Date: Jun 2014
Location: Williamsburg, VA
Posts: 1,811
Default Re: Missing at 3500 RPM and Above

After getting my broken door glass replaced I finally got around to checking to see if fuel flow was restricted. The electric pump pushed a nice steady stream through the filters, mechanical fuel pump, and pressure regulator. The mechanical pump also pumped a decent amount, through turned-off electric pump when cranking the engine.

So, back to the ignition as primary suspect. I replaced the Bosch blue coil with the Pertronix Flamethrower I had left from when I removed the Pertronix Ignition. I took the opportunity to check both coils with my trusty Simpson 260 meter. The Pertronix measured 1.5 Ohms in the primary windings, as labeled. The Bosch measured 2.6 Ohms; not right. I have not taken it for a test run yet, but hoping the high resistance of the Bosch coil could be the problem. But why would the Bosch coil work okay no load and break down when winding up in second gear? Maybe because the no-load test was with a cold coil and the street test it was hot?
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