I have a 1991 accord. My car will not start in the morning after a night of resting. Every morning i have to boost it. After i boost it, it starts fine by itself the rest of the day. Its like the battery loses all power during the night. HELP needed!!!!

 

Either you've a Battery that has decided to volunteer for service as a boat anchor, or you have something other than the ECM and the clock being powered while the key's in the off position.
First thing I would do is verifying the Alternator is charging the battery sufficiently. This can be done by sampling the voltage at the battery terminals with a multimeter. With the car running, you should see anywhere between 13.8 and 14.2 volts. If you don't, have the alternator looked at.
I would then move on to checking the individual circuits in the car by pulling the fuses* (one at a time) and bridging between the holder terminals with the multimeter. You should get readings (with the key off) for only the ECM and clock Fuse(s).
If any others show continuity, that's the circuit causing your draw.
It's just a matter from that point of determining what that circuit feeds.

P

*make sure you have the radio security code (if needed) or it's gonna get pretty quiet.

 

Did you find the problem yet???

 

Probably double-posted and found his answer elsewhere.......