Hot ignition Module

[Anonymous]

Hey I have an 81 GS250. Runs great until the ignition module gets hot and then starts after-firing and all this junk. Once ignition module cools off it runs fine. If I unplug the positive regulator wire to the battery, the igniton module doesn't get hot. Anyone have any ideas as to whats wrong? BTW the module is relatively new, I replace the regulator with the electrex unit when the last igniter blew as that was the reason the old module blew in the first place.

[duaneage]

Measure the coltage on the battery while the engine is running at 5000 rpm, should be 14-14.8 volts. You might have a bad coil, measure the resistance of the coil, should be 3 ohms on the promary and 15000 or so on the secondary.

A voltmeter is essential for working on a gs

[Anonymous]

ive got about 14.8 going to the battery. I checked the restistance on the coils, they are checking out ok

[duaneage]

when you say the module is relatively new, does that mean it is a new from the store module or one that you bought from someone used? It seems to be the only thing left on it's own that could be the problem. I know they are expensive but buying modules that are suspect will not do you any good.
A new one, either OEM or aftermarket, might be the best thing.