I know that Volvos are famous for electrical issues and your suggestions are all good ones. However since this running rough issue started after I had washed under the hood, even tho I was careful not to try to hit the spark plugs, etc., only the engine, water from a car wash does splash. So I'm wondering if doing that would have hit something under the hood and, if so, what? Did change out the spark plugs anyway, was needed, and I am going to get some thermal grease/heat sink compound today to put between the 2 parts of the ignition control module. Any other ideas given the washing under the hood action that seemed to be the beginning of all these problems?
I assume when you said to check the mass airflow sneer you really meant to say sensor? Thanks for your tips. I'm thinking I really need to take it to a real volvo mechanic (hard to find one, let alone a good one in my area) to help diagnose. Today, it was doing the limp home thing after about 5 miles. Thanks for your help.