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On 19 Dec 2004 19:24:09 -0800, wrote:
I have an early 1980's modle 318 Chrysler engine installed in a
mudboat. About 2 years ago I developed a problem with the Ignition
coil burning up. The engine has the original electronic ignition
system installed, but has been completely rewired by a Dodge
dealership, the control module, ballast resistor, and the distributor
pick-up assy. have been replaced. However, I continue to have the
problem. The engine runs perfectly for about 3 months and then without
any warning, will backfire and die. There will be no ignition fire
until the coil is replace, then the engine will start up and run fine
for another few months. Any help or suggestions with this problem would
be GREATLY appreciated.
Sounds to me like your coil is being "fried" because there is too much
voltage being run through it. Most coils are designed to run at the
full 12V when starting, but then switch in a dropping resistor which
drops the voltage down to about 8V when running. If this dropping
resistor is absent, the coil will get the full charge at all times.
Another thing to check is your charging voltage. If your alternator
regulator is acting up, and the charge voltage runs up to 16 or 17 V
the same thing could happen. Although, you'd probably notice your
batteries boiling over and very bright lights as well.
Dave
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