Well, my dad finally needed the space in his driveway and I have fixed all the problems in my wife's 2001 Prius so for Father's day he gave me is 2000 Insight.
He was probably one of the first buyers, put 165k miles on the car, and really hasn't been driving it for a number of years. So we fired it up (he keeps the 12v on a trickle charger), checked the oil, and I drove it home.
1) Dirty (fixed with a good car washing)
2) Maint Reqd service light on
3) When it's been sitting awhile the IMA battery goes "dead". The car starts with the manual starter, then the 12v battery light is on. Let it run for a minute, shut it down, start it up, and the IMA can crank the engine.
4) The HV battery slowly charges to about 60% of the bars then hops to almost 90% of the bars.
5) IMA assist and regen both work. So the battery isn't total toast. I think Honda replaced it at around 100-110k miles on it under a handshake warranty or something (Dad's like that)
6) Dad reports that sometimes after hitting a bump or something the 12v battery light comes on and the system stops charging the 12v. Then the car has a half hour to an hour before the battery dies. If you shut down and restart the inverter usually kicks in.
7) Really weird: The gas gauge reads no bars with the gas light on. Something wrong with the sender maybe?
Car shudders badly in reverse. Guessing bad motor mount?
What I can see:
The car is dirty. By that I mean the engine compartment is dirty, and the screw from the battery negative to the car is corroded. I'm guessing there is a ground float somewhere which is tripping the 150v to 12v inverter.
Aside from that it runs. Current MPG is about 47, it drives fine enough on the highway (does require some downshifts since I don't want to stress the IMA battery) and I can fit in it (I'm 6'8 as is my dad).
So what should I be looking for, what are good first steps, and the like to get the gas gauge working, the inverter/charger to be stable, and how long before the HV battery goes dead without driving? I would be happy to use it as a semi-daily driver alongside my battery powered S10 pickup.