Q&A

The first question is, do you have a "check engine" light on? If so, have you gone to someplace to have the code(s) read? If so, what were they? Moving forward not knowing the answers to those questions, I wil tell you my "best guess". Best guess would be you have small cracks in your spark plug wires, water got into the wire(s) under the insulation, and its misfiring due to inability to carry higher voltage loads under acceleration & at higher engine RPM's. Sometimes they dry out on their own - takes a couple days - sometimes they don't. If not, you'll have to replace the wires. Vacuum lines that are disconnected/broken usually cause a slightly higher idle, if the hose was small; the engine would not start/die if it was a bigger hose.