cranks and starts but wont keep ruuning

DBlascyk said

sorry, i meant taken from start to run

It's a 1973 duster with 225 and factory electronic ignition

I have it wired as the instructions say, red wire to the starter, yellow wire to the fuse panel then relay, blue wire to fuse panel then resistor, and black wire to the fuse panel

The brown and small black wire aren't in the instructions so are not connected

T


I have a picture of the diagram and instructions if y'all would like to look at them

Click to expand...

The brown is your problem, here is how Mopar ignition switches work:

There is "start" hot only during starting, and fires up the start relay

There is IGN1 "ignition run" and is hot ONLY in the run position. IT IS NOT powered during cranking

So HOW does the ignition get power during cranking? There is a brown comes off a separate contact on the switch, goes through the bulkhead connector and to the coil+ side of the ballast

Sounds to me like your brown / IGN2/ bypass circuit is connected, but not the run circuit