So this is the issue I'm having and can't find a thread to help get me started on a diagnosis or to actually cure the problem. I've come to a few of my own conclusions but maybe someone can chime in.
Car: 74' duster with a 340 out of a '72
Problem: spark breakup attributed to the voltage regulator
Scenario: While driving, when I load up the engine (3/4 to full throttle) and the RPMs run between 2500 and 5000 I get spark breakup. My tach is bouncing all over the place when the breakup occurs, right near the 8-10K mark (which is not the true engine RPM). Even at idle the needle sits around 800-1000 but it isn't smooth, still kind of jumps around. When I disconnect the voltage regulator, the car runs perfect and the tach is smooth and displays the correct engine RPM. The voltage is normal sitting between 12 and 14 volts. What could this be?
At first I thought it was interference with the coil wires so I unbundled and separated them from their electrical tape cocoon but still no dice. Is something not grounded? Could this be a faulty regulator? I obtained this duster like this so I don't have any prior knowledge about the engine swap.
Any help is appreciated,
Andy
Car: 74' duster with a 340 out of a '72
Problem: spark breakup attributed to the voltage regulator
Scenario: While driving, when I load up the engine (3/4 to full throttle) and the RPMs run between 2500 and 5000 I get spark breakup. My tach is bouncing all over the place when the breakup occurs, right near the 8-10K mark (which is not the true engine RPM). Even at idle the needle sits around 800-1000 but it isn't smooth, still kind of jumps around. When I disconnect the voltage regulator, the car runs perfect and the tach is smooth and displays the correct engine RPM. The voltage is normal sitting between 12 and 14 volts. What could this be?
At first I thought it was interference with the coil wires so I unbundled and separated them from their electrical tape cocoon but still no dice. Is something not grounded? Could this be a faulty regulator? I obtained this duster like this so I don't have any prior knowledge about the engine swap.
Any help is appreciated,
Andy