The OVP is frequently blamed for many problems and seems to be the first culprit when a problem arises. I don,t know why.
First, I'd make sure the ignition system is in top shape. Damp weather is the ennemy of tired wires. Spark plugs, distributor cap, rotor, ignition (coil) wires. This is the first step.
Then, the fuel system: Fuel filter, fuel accumulator, check valve.
A good clean-up of the fuel injectors could also be appropriate.
Good luck
jackD