It is possible that there will be some issues with starting after pressure washing is done not right. Often people forget that there are areas in the engine bay that are sensitive to even small amounts of water. I always cover the air filter and the fuse box before washing the insides of the car.
It takes some time, but it is the only way to ensure you will not damage the car. It is also recommended to choose lower pressure not to ruin anything inside. And if you don't have time or are unsure that you can wash the car properly, you can always call guys like https://sparklewash.com/nashville/ to get some help