Idles rough, runs okay when driving?

Hey Ken. Thanks for the suggestion. I certainly will explore every possibility. I did attach again the results from the scan. Maybe it will give you a little bit more information. Thanks again, Ed.

Ken, I briefly read through that first article, and I can say that I have a high degree of vacuum from the valve cover with the oil cap removed and hand in opening. Also, I noticed when replacing the PCV diaphragm that the hose that goes down to the intake manifold had a high degree of oil in it, and there was sooty exhaust around the tailpipe. The car is actually my neighbor’s, but I am going to take it from him since he doesn’t want to entertain the issues. Thanks again. Ed

Hey Ken. Thanks for all the help. I certainly can accomplish the above, but wondering if it would be prudent to use a homemade smoke machine to minimize the amount of new parts I put into this car. I know the engine vent hose is also suspicious. In these models but need to remove intake manifold to get to it. I guess I could narrow my search with carb cleaner, leak detection, and possibly that homemade smoke machine that I was going to put together. Again, thanks for the help. I will update as soon as I get started. Thank you. Ed