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  #1  
Old 10-16-2012, 01:24 PM
BOSSXB BOSSXB is offline
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Default Confirmation of fault please.

Hey tech men, just before I go out and order a new dizzy would you be able to confirm my diagnosis please???

Set up-MSD 8578 with MSD blaster 2 coil and 6al control box.
FAULT-engine won't fire.
I tested the ignition system as per your test procedures with shorting the trigger wire, and I would get great spark from the coil lead. I Put my timing light on to check initial timing, and it wouldn't even trigger the strobe. If I lined up the rotor button with #1 plug lead and removed the lead from my engine and shorted the trigger wires I would get a great spark from the lead and it would also trigger the strobe light of the timing gun. Put it all back together and then still it wouldnt fire. I then tested the resistance of the magnetic pick up, your specs are 400-1300ohms, my test results are 230K ohms. So my diagnosis is that the pick up is U/S and breaking down under load, would this be correct???
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Old 10-16-2012, 02:29 PM
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msdtech1955 msdtech1955 is offline
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Default

either , we are not getting voltage on the thin red wire while cranking ...

or the distributor is not turning .....

or the magnetic pick-up is bad........
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Old 10-16-2012, 03:35 PM
BOSSXB BOSSXB is offline
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Default Tests

Firstly, yes the dizzy is spinning. Secondly what voltage should I expect to see on that red wire and is that the switched 12v wire? Thirly can I just buy the mag pick up?
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Old 10-16-2012, 04:15 PM
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msdtech1955 msdtech1955 is offline
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You should see 10 to 12 volts on the thin red wire while cranking ...and yes, a new magnetic pick-up is part number 84661


http://www.msdignition.com/product.a...37&terms=84661
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