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HEI help!!

Discussion in '40- & 55-Series Tech' started by Design311, Dec 23, 2002.

  1. Design311

    Design311

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    Alright, I've been screwing around with this damn thing for a week now. I bought the Cruiser with the original F and a HEI distributor. It fired fine up to a couple weeks ago. Now no freakin spark at all. I suck at electronic problems...

    Here's what I replaced:
    Cap
    Rotor
    Wires
    Plugs
    Ignition module
    Coil

    Not replaced:
    Condenser
    Magnetic pickup

    I am getting around 11.8 volts to the coil. I am also registering 11.8 or so out of the two wires running from the coil to the distributor that lead to the condenser and module. The condenser also is showing around 11.8 volts output. The two wires going into the module are getting around 11.8. Both wires coming out of the module are reading around 11.8. I can't get the damn coil to fire. I've replaced the coil twice thinking that I may have gotten a bad coil. It won't spark when you pull the wire from the coil to the cap. Anyone have any ideas. Think the magnetic pickup is bad? I need some help before I loose my mind...
     
  2. Erics75

    Erics75

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    You could have a bad condensor but one thing thats bothers me is that you have full battery voltage to your coil. Normally there is a resistor to reduce the voltage which prevents the coil from overheating and decreasing the life of the coil. I can't for the life of me find a good schematic, but the resistor will be inline between the ignition switch and coil.
    Eric
     
  3. Gumby

    Gumby Supamod Staff Member s-Moderator

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    HEI runs full 12V at the coil terminal. The pick up coil could certainly be a problem. You can test the module by simulating a trigger at one of the terminals. Since it makes a spark, you can test the coil at the same time. I'll see if I can't find the procedure, but a google search might come up with it.
    Don't forget, especially with the conversion, to check to see if the distributer is actually rotating. I've seen folks who replace everything and the roll pin has sheared on the gear or even the cam isn't turning. The best one was the crank broke at the front bearing so it wasn't turning the timing gears.
     
  4. Erics75

    Erics75

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    Not to change the subject, and I see there should be 12 volts at the coil, but what keeps the coil from burning up if there is no resistor?
     
  5. Gumby

    Gumby Supamod Staff Member s-Moderator

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    The HEI coil is built to take it. I don't know what makes it different from a round barrel coil, but it works.
     
  6. Gumby

    Gumby Supamod Staff Member s-Moderator

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    This site is as good as any I have seen for outlining the procedure of how to make the module fire. If the module fires with this test, you need a pick up coil.

    http://www.chevelles.com/techref/tecref5.html

    Hope it helps
     
  7. Design311

    Design311

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    Update: Pulled the distributor and tore it completely down. It turns out to be the magnetic pickup coil. It was totally trashed. The plastic was totally gone around the coil wires and it wasn't magnetizing at all. Thanks for all the support. I can't wait for the parts store to get it in so I can put it all back together. I haven't driven it in over 3 weeks and I'm having serious withdrawls... :'(
     
  8. Mavric1298

    Mavric1298

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    I feel ya, I have been cruizer free for 3 months now, i want to to drive one RIGHT now!!!!! :'( :D :'( serious mood swings with out my baby workin