engine dies

[big block]

1974 plymouth duster 360 points dist.
engine starts and instantly dies. new points and condenser new coil bypass the resister. engine starts and instantly dies.???? any suggestions.

 

[xLURKxDOGx]

1974 plymouth duster 360 points dist.
engine starts and instantly dies. new points and condenser new coil bypass the resister. engine starts and instantly dies.???? any suggestions.

Ballast resistor.

Jake

 

[mycuda]

Coil power wire not right. ballast hook up as well.


Not to be an *** but. Ecu kit worth your $

 

[318willrun]

If it starts and then dies as soon as you let off the key, that is the ballast resistor

 

[AJ/FormS]

Total lack of respect for the laws of science;
After the ignition is proved to be working;
Fill the fuel bowl with gas and splash some gas down the her big mouth, I bet she flares right up. If she dies again, try once more. After that ......... Ima guessing the pump isn't finding gas to pump............. Good luck

 

[Dana67Dart]

If it starts and then dies as soon as you let off the key, that is the ballast resistor

Or
Ignition switch
Or wiring between the two.

Turn key to ON position
Measure voltage on both sides at the ballast resister.
No volts on both sides would be issue in switch or wiring between ballast and switch etc.
No voltage only on one side of ballast resister, resister is bad .

 

[nm9stheham]

Or
Ignition switch
Or wiring between the two.

Turn key to ON position
Measure voltage on both sides at the ballast resister.
No volts on both sides would be issue in switch or wiring between ballast and switch etc.
No voltage only on one side of ballast resister, resister is bad .

If the ballast has been bypassed as per the OP's post, this is the likely problem: ignition switch, or the main RUN wire from it to the ballast, which is the dark blue wire; the brown wire is the bypass wire to put 12 volts to coil plus when starting. Lack of fuel would usually sputter and die, not die immediately. Also, check the points gap at full open; should be about .017" as a starting point.

 

[Dana67Dart]

bypassed as per the OP's post

missed that point thanks, and on to that point... why would the ballast resistor be bypassed (except for testing)

 

[nm9stheham]

For testing, as you say....? Or out of lack of knowledge if it is bypassed all the time.