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HEI conversion but now hard to start
https://slantsix.org/forum/viewtopic.php?t=60759		 Page 1 of 1
Author:  bbgbouncer [ Thu Feb 09, 2017 10:34 am ]
Post subject:  HEI conversion but now hard to start
I have converted my 73 w100 360 to HEI. Once it is running it works. However I have a really hard time getting it to start. the engine only seems to "catch" when I let off the key. Any thoughts?
Author:  drgonzo [ Thu Feb 09, 2017 10:54 am ]
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I would think you are not getting enough power to the ignition. I relayed mine straight from the battery and she starts and runs great.
Author:  Reed [ Thu Feb 09, 2017 11:11 am ]
Post subject: 
Have you tried reversing the leads to the distributor? Did you remember to remove the ballast resistor and put a jumper in its place?
Author:  bbgbouncer [ Thu Feb 09, 2017 11:43 am ]
Post subject: 
I have already reversed the leads it did not help. I will try that again. I will check to see if I have power when the key is moved to start.
Author:  wjajr [ Thu Feb 09, 2017 11:54 am ]
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Mopar stock ignition design has two circuits: "start" that supplies a full 12v to coil when starter is engaged; "Run" circuit is energized when key is in run position and ballast resistor is part of this stepping down 12v to 8v or so a level stock coil can live with. Only one of the two circuits is energized at any given time.

If you are not getting light-off during starter engagement, that start circuit is not able to supply voltage to coil for some reason. I think you need to tie the run and start circuits together.
Author:  bbgbouncer [ Thu Feb 09, 2017 1:23 pm ]
Post subject: 
I feel like an idiot. I did not wire the "start" wire to the coil/HEI. I had only run the ignition on wire.

hooked up the start wire and it works like magic.
Author:  Reed [ Thu Feb 09, 2017 1:37 pm ]
Post subject: 
:wink:
Author:  Rick Covalt [ Thu Feb 09, 2017 4:45 pm ]
Post subject: 
Quote:
I feel like an idiot
I feel like that quite a bit! Welcome to the club, your in good company. Glad it was an easy fix.

Rick
Author:  Reed [ Thu Feb 09, 2017 4:54 pm ]
Post subject: 
Quote:
Quote:
I feel like an idiot
I feel like that quite a bit! Welcome to the club, your in good company. Glad it was an easy fix.

Rick
Yeah, its a rare day when I don't feel like an idiot! That just means I am always learning new things.
Author:  SlantGeek [ Fri Mar 24, 2017 7:55 am ]
Post subject: 
Quote:
Quote:
Quote:
I feel like an idiot
I feel like that quite a bit! Welcome to the club, your in good company. Glad it was an easy fix.

Rick
Yeah, its a rare day when I don't feel like an idiot! That just means I am always learning new things.
Ha, I'm an ASE certified mechanic (http://www.dulleschryslerdodgejeep.com) and stuff like this happens to me too. It really irritates me when it does but you know Murphy's law. The guys above have nailed the answer. HID bulbs draw a lot of power, especially on startup. If thats starving your ignition, yup...it might not start. Thanks for sharing this with everyone!
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