Did you ever replace the cap?noticed one of the capacitors oozed goop everywhere. I cleaned that up and ordered a new capacitor for $2.
My amp1 took a nosedive tonight. I actually heard it hissing from the door speaker for a short while. Worked fine this morning. Floor has been bone dry. I'll pull the amp this week to have a look. Cap would be too easy knowing this car. But the silicon is also available.