Help ignition..here we go again,,,
Same ol 360 ..milled the block to even it out..same with the j heads small valves basically stock pistons and 340 cam.,edelbrock carb and manifold...in a 73 duster with a 74 wire harness,stock ign and charging system..everything new or rebuilt..orange box ign... mopar regulator..what in the system would keep it from starting while cranking but let it start just as the switch comes back to the run position...j
The ignition has a wire that goes ONE place. This is the wire which gives you ignition power in "start" and Ma calls it "IGN2" It's traditionally brown, and goes from a contact on the ignition switch, through the SWITCH CONNECTOR, through the BULKHEAD CONNECTOR, and ends at the coil + side of the ballast connector
If this wire has lost connection or is not hooked up you won't get ignition power in "start."
What do you have for a shop manual/ wiring diagrams?
73, 74 diagrams
http://www.mymopar.com/downloads/1973/73ValiantA.jpg
http://www.mymopar.com/downloads/1973/73ValiantB.jpg
http://www.mymopar.com/downloads/1974/74ValiantA.jpg
http://www.mymopar.com/downloads/1974/74ValiantB.jpg
Look at socket "Q" on the bulkhead connector on either diagram "A" above. "Q" is brown wire, goes up to the coil resistor
Now follow that off the page to "B" and find the brown going to the ignition switch
(Fourth wire from the top of the connector)
Check both those points with your meter. To keep the starter from cranking, just disconnect either of the "push on" terminals at the starter relay.
Now first probe the coil PLUS terminal, turn the key to start and confirm you have no power.
Next access the ignition switch connector and check there at the brown in crank. If you have power there on the dash harness side of the connector then the trouble just about has to be in the bulkhead connector
THIS IS ONE WIRE. This IS the dictionary definition of "electrical 101"