No spark

[USatC]

been running through my ignition wiring and suddenly lost spark out of my coil. Like it was running one second then i turn it off and no spark. I have 6 volts running to it when starting but no spark next to a screwdriver from the coil. Replaced coil and same thing. It’s a Mallory distributor and coil.

 

[Demonic]

Ballast resistor maybe. What year car?

 

[tonysrt]

6 volts in the start position is low. Should be about 10 -12 volts at start and about 6-8 when in the running position.

 

[USatC]

New ballast resistor

 

[USatC]

6 volts in the start position is low. Should be about 10 -12 volts at start and about 6-8 when in the running position.

Aren’t Mallory coils 6 volt starts?

 

[moes]

it could be a bad ignition switch, bad coil or even a bad ECU if you have electronc ignition or the wiring it self. If you have regular distributor with points it could be the points are corroded on the point contacts or a bad condenser, try cleaning the point with a file or sandpaper and regap them.

 

[USatC]

it could be a bad ignition switch, bad coil or even a bad ECU if you have electronc ignition or the wiring it self. If you have regular distributor with points it could be the points are corroded on the point contacts or a bad condenser, try cleaning the point with a file or sandpaper and regap them.

Could it be the ignition if the car turns?

 

[moes]

it should be OK, did you check those other things I mentioned? What type of distributor are you running electronic or regular points?

 

[USatC]

it should be OK, did you check those other things I mentioned? What type of distributor are you running electronic or regular points?

Mallory distributor. Changed the coil.

 

[moes]

Mallory distributor. Changed the coil.

so it is an electronic distributor like this one

 

[USatC]

Like this

 

[USatC]

so it is an electronic distributor like this one

View attachment 583642

The one above

 

[moes]

Like this

View attachment 583675

Sorry for the crude diagram. Click on the diagram to make it bigger so you can see it better.
Do you have it wired like this? If you have 12 volts from the ignition switch you have to use a ballast resistor or it will DESTROY the ignition module in the distributor.