I have 2 prius. Basically, my daily driver has run well but the actuator went bad and I've put that job aside until I have more time. The hybrid-battery in this car is good. However, my spare Prius had battery hybrid-battery issues (bad block 3) so I installed the hybrid battery from the daily-driver into the spare. The spare engine doesn't sound so good as it really hasnt' been driven in 2 years. The car sputters upon letting off the gas pedal. The spare isn't insured thats why I avoided driving this car on the road.I've started it up occasionally while it sat but even that couldn't save the battery from dying. what is necessary to get this car that has sat running well. So far after replacing the hybrid-battery I have put in a new air-filter and was wondering if changing fluids are necessary as well. Do spark plugs go bad without use? I'm pretty sure I put new spark plugs in 2 years ago before it wasn't used at all. do fuel injectors go bad if they havent been used? I assume they have but prior to sitting, everything on this car was well-maintained. What is the best method to clean the fuel that has sat in the car? Should I siphon it out or drive it out. the tank is 1/4 full. I don't know what to tackle first or if everything needs to be fixed: dirty manifold, PCV valve, spark plugs, etc. Coincidentally there is quite a bit of rust of this engine now....just really not sure what to prioritize. ANY ADVICE APPRECIATED!
