Electronic control module melted!

[Jonah Hex]

Has anyone seen this before?

I popped the hood on my ‘70 ‘Cuda this morning and noticed that there was something leaking down the firewall from my ECM. I pulled it off and found.....this!
Needless to say, this is very concerning. I have never seen one do this before. I can only assume that I have some sort of over-voltage (or current) issue.
Thoughts?

 

[57fury440]

I've seen that happen on a really old unit I had sitting on a shelf.

 

[704406]

I had one on my Cuda do that but not to that extent. It just melted in one corner and ran like crap off and on. I traced it down to over voltage as my bulkhead connector was corroded a bit and the charging circuit was losing almost 3 volts from alternator to battery, causing the alternator to over charge constantly

 

[rbbruno3]

I too have had perfectly good units sitting on A shelf Do this over time

 

[Chryco Psycho]

You may want to get a Rev-N-Ator unit

 

[AUSTA]

We use that epoxy to fill our electronics if it isn't mixed right it will run like that the stuff underneath is crushed glass or sand basically to save on epoxy as it is quite expensive

 

[Daves69]

Has anyone seen this before?

Same scenario as two previous posters. Had two mid '70 units in the same box on a shelf for years. One leeched it's goo all over the bottom of the box, the other is still fine. A fairly common issue some relate to the mix breaking down over time.

 

[Jonah Hex]

Thanks for the replies. I saw that it was filled with either sand or crushed glass underneath the epoxy. It makes for a sticky mess when the epoxy breaks down and runs.
I will check the bulkhead connections to make sure that I don’t have a bad connection, and check for the voltage drop.
The Rev-N-Nator unit looks promising, if a bit spendy.
Again, thanks for the insight!