2000 DAK Quad shock question

From : mark

Q: i have a 93 b250 5.2l v8 that misses sometimes. its very intermitent and i havent noticed that its weather related. it will run fine for weeks and then start hitting only 7 cylinders. it seems less prone to miss when its due for an oil change. i changed plug wires new oem and cleaned the plugs which appeared to solve the problem for about 3 weeks. i changed oil last week and now its missing again. any ideas thanks -- it is a bit embarrassing to have been concerned with the human problem all ones life and find at the end that one has no more to offer by way of advice than try to be a little kinder. -aldous huxley novelist 1894-1963 .