HEI in Mopar ECU casing

I took the pic when I had just taken the module out of the car again. Groundwire is still in the car.
There was still some amount of heatsink compound left on the CPU cooler, but the module never even got as much as a slightly warm as it couldn't get the engine running at all.


Voltage spikes can also kill these things quick. I always run a relay when installing HEI in my cars,never had any trouble with a module.