I just buought a 98 Volvo S70 T5, the car sat for abit, to the point were It had to jump it. to start. ran great for the next 2 hours off and on mybe 7 diffrent starts but it never running for more then 15 min at a time. total miles day 1, 25? about........ Day 2 about 24-30 hours later it did start at 1st i thought it turned over slow like pwr was weak drove it 1 way 2miles it sat mybe 15 this time time it turned over very slowly i thought it was going to die, but after 3-4 time trying to start it DID! Drove it back 1.5 miles then the eng light came. It drives great I think and feel the battery is not fully charged will try that some time to day. or get a new battery if need be.....