INDY27

Have a 96 502 MPI and my coil keeps going out when the boat is idling, I have new plug wires, dist. cap, rotor button and even swapped the the ignition relay. The distributor is less than a year old so I have not swapped the module yet but that is the only other thing I can think of, any ideas?

Ted G

iTrader: (1)

Check actual voltage to the coil while it's idling. It sounds like you may be overheating it due to low voltage. The module should not be able to kill a coil since it's switching voltage is so low. Also make sure you have a good ground at the coil for the same reason.

Dave_N

The Delco EST distributor uses variable dwell to control coil current (and temp). You can use a common dwell meter to see if it is doing what it is supposed to. At idle, you should have less than 15 degrees of dwell. At just over a thousand RPM, you should see in increase to about 23 degrees dwell.

Dave