62 Fuelie with Pertronix troubles
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When the engine stumbles and dies, have you ever seen fuel coming out of the top of the fuel bowl?
FYI: 15.2 Volts on the hot side of the ballast resistor sez your Voltage regulator needs adjusting. You should be seeing ~14.0 Volts.
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By "very little".... how much time is that? 1 minute? 5 minutes? 3.14 minutes?
When the engine stumbles and dies, have you ever seen fuel coming out of the top of the fuel bowl?
FYI: 15.2 Volts on the hot side of the ballast resistor sez your Voltage regulator needs adjusting. You should be seeing ~14.0 Volts.
Ok, I'll try and adjust the voltage regulator if I can do it without opening it up.- Top
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Gary- Top
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From the voltage readings I expect the ballast is 0.3 ohms, but actual measurements of ballast resistance and coil primary resistance (along with identifying the coils by part number either OE or aftermarket) is needed.
Given that the problem always starts after about about the same amount of engine run time, it could be a thermal issue. Assuming the ballast is 0.3 ohm swapping in a 1.8 ohm unit along with adjusting system voltage down below 14.5 will reduce primary current for less wattage and therefore heat input to the coil.
Duke
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May not be a 100% shot in the dark. I'd put a vacuum gauge on the engine and see what happens at that 10 minute mark? Additionally, a fuel pressure gauge temporarily plumbed in just before the carburetor would be a great bonus (stay away from those little made-in-China jobs). If it loses fuel pressure after 10 minutes, you'll know the culprit. WS- Top
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May not be a 100% shot in the dark. I'd put a vacuum gauge on the engine and see what happens at that 10 minute mark? Additionally, a fuel pressure gauge temporarily plumbed in just before the carburetor would be a great bonus (stay away from those little made-in-China jobs). If it loses fuel pressure after 10 minutes, you'll know the culprit. WS
It's a fuelie, but no matter, I'm going to see what kind of fuel flow I get with the electric pump which I think is a Carter--don't know if it's China junk or not but I'm inclined to revert to the stock mechanical fuel pump. I originally changed it so as to facilitate starting but it takes so long to prime/fill the bowl that I'm almost convinced it's not pushing enough fuel.- Top
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Wayne,
It's a fuelie, but no matter, I'm going to see what kind of fuel flow I get with the electric pump which I think is a Carter--don't know if it's China junk or not but I'm inclined to revert to the stock mechanical fuel pump. I originally changed it so as to facilitate starting but it takes so long to prime/fill the bowl that I'm almost convinced it's not pushing enough fuel.- Top
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The Pertronix had no condenser of course so when I reinstalled the points ignition I also put in a new condenser. Heck, years ago I even forgot to install a condenser-duh!--but that time it was easy since it wouldn't fire.- Top
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After that, I may shoot it--LOL--or else put in carb/manifold until I can get my local FI guru to go through the injector. I want to be able to drive the car this summer!- Top
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Today I put in a 1.8 ohm ballast resistor, the two fuel filters (inline and on the injector), new Autolite 295 plugs and 5 gals of av gas. If the limited 10 minute-long persists, out comes the electric pump (tested it COLD today and flows plenty) and in goes the mechanical one tomorrow.
After that, I may shoot it--LOL--or else put in carb/manifold until I can get my local FI guru to go through the injector. I want to be able to drive the car this summer!
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