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Old 10-31-2010, 09:56 AM
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engine ignition gremlins HELP Please !!!!!

I have a 1974 Dodge D-300 318c.i and a Edlebrock 4 barrel.
I have had continuous ignition/electrical problems with it.
Engine has been rebuilt and when she starts, it runs well.
New Eldbrock 4 barrel carb (man choke) and all ingition parts within 1 yr old.
PROBLEM - When trying to start it, it may start but only after I let go of the key (starter not activated). It mostly just burps & I end up flooding it !

I've replaced ballast res.

Any help would be AWESOME !!!

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Old 10-31-2010, 10:38 AM
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Timing too far advanced?
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Old 10-31-2010, 11:16 AM
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The ballast resister is in the run (ignition ON) circuit to the coil.
During the starting mode (cranking) this resister is by-passed by a circuit that is activated by the starter to provide a full 12 volts to the coil.
Some Mopar starter arrangements used a separate contact in the starter solenoid to achieve this by-pass and some used a relay.
Test this circuit by connecting a voltmeter to the + side of the coil. During cranking this wire should read battery voltage. If not the circuit from the starter is not working. Bad relay or bad connection.

vicrod
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Old 10-31-2010, 11:27 AM
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Thanks for the replies,
Timing should be fine as I was driving the day before with no problems. Went to start last eve and started fairly easy but caught & continued running when key was let go. Ran for 10 mins then just died slowly now won't start. definetly not fuel.
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Old 10-31-2010, 11:31 AM
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Hi VICROD,
The starter relay (i Believe)is on the fender. Would that cause the engine to slowly die ?
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Old 10-31-2010, 11:45 AM
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The relay may have internal resistance to ground that could pull down the voltage to the coil.
Disconnect the relay and by-pass the ballast resister with a jumper direct from the battery + to the coil + to start the engine.
After the engine is running disconnect the jumper. If the engine runs OK you will need to replace the relay.

vicrod
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Old 10-31-2010, 12:29 PM
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Thanks Vicrod,

I will go that way but I will put in my spare new relay.
I will also inspect/replace all ground wires even if the above works.
Thanks
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Old 11-02-2010, 07:21 PM
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Hi again Vicrod,
Now I have no spark at all. I tried all your ideas but still no go.
I sent it to a co-worker who used to be a mechanic & go figure - specializes in old dodges especially trucks. He suggests its problem stems from the distributer. Once he isolates the problem, he's likely going to install an electronic one.
I will keep all posted in what happens
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