Report "Our vitara lost power going up hills and shut down 3 times . after sitting overnight the car would start and seem to run fine. we kept taking it to the dealer and they said nothing was wrong with it. they said they were driving it and their computers said everything seemed o.k. when the car shut down the fourth time it went completely dead. no power anywhere. it would not start the next morning. we towed it to the dealer and now they tell us the computer is shot and is under waranty but they said all the coils are bad and they want to charge us 1300.00 to replace them. does this sound right?"