Tracking down some info on a noisy chorus pedal:

Maybe a cap job for the CE-2?Yes, that’s almost certainly the problem – a
failing de-coupling electrolytic cap between the oscillator and the audio
circuit. Electrolytic caps degrade with age and can also fail suddenly – old
Boss pedals are getting into the age range where this happens, and I’ve come
across several. The main DC filtering one may be on the way out too, which could
explain why it needs more voltage to light the LED.If you can’t easily trace the
one(s) you need to change, just replace all the electrolytic caps (there aren’t
many, and they aren’t expensive) and it will probably fix it and make it good
for the next 20 years.