we have a99 volvo s 70 that has a starting issue. it will start then quit and when we try to restart it will turn over but with no spark we have replaced the antenna that read the chip key but it still has the same problem. we have replaced the spark plugs as the old ones looked like they were original. when the weather gets warm and the moisture is out of the air it will start and keep running. the car has 185k plus on the odometer. HELP
If you have a distributor, I would replace, in order, the spark plug wires, distributor cap, rotor, and coil. If you have coil over plug ignition, I wouldn’t have a clue.