I am soooooooooooo grateful for everyone's response!!! I have learned so much from this thread and understand much better what's likely going on and going to happen long and short term.i use the van pretty much only for towing. It sits weeks (sometimes months) at a time. I average 9,000 miles a year and usually 6,000 of those miles is accumulated in a one month long vacation towing the TT across some part of the USA or Canada. The remaining 3,000 is usually towing the boat around. It gets an oil change before and after each vacation.
So, short term I am going to add engine restore and a good fuel injector cleaner and take it on a nice road trip without towing. Maybe 500 or 600 miles of easy highway driving at 75mph. Then I'm going to drive it every day for awhile and see if that helps at all. Long term I am going to be diligent about checking the oil as I have been and I'm going to keep it without doing anything major to it for as long as I can. Nurse it along rather than doctor it up. LOL
I bought my daily driver, a 1987 ford crown Victoria new and have over 300,000 miles on the original engine. I replaced the tranny at 250,000.... It's pretty much in showroom condition and still rides great. Same average miles a year but I'm driving it every day keeping everything lubed. DW has the new car we bought in 2004 and that one averages 9000 miles a year as well but is driven every day too.
My poor Van.... I feel like I've neglected and abused it... But not anymore! From now on I'm going to show it the love and attention it deserves and spend some real quality time with it! (I'm a marriage and family counselor/minister. This is how my mind works.) thank you everyone!