Restricted fuel delivery and malfunctioning spark plugs are the most common reasons for cars to hesitate during acceleration. The first step to identifying the cause of this is to find out if the car is fuel-injected or if it has a carburetor.
In a large pan mix the water and vinegar. Gently add the berries and gently remove them to a colander to drain. Repeat this washing and draining. After they have drained, remove the berries and place them on a cookie sheet lined with paper towels. I place this in front of a fan or under a ceiling fan until all the berries are very dry.
Spread the berries evenly over the towels and leave them to dry for an hour or two. If necessary, blot them with paper towels to remove additional surface moisture. If you don't want to devote the time and effort to thorough drying, you can wash small amounts of berries with vinegar as you need them.