you really should do a valve adjustment. as rough as your truck was idleing sunday before you left my house, thats where i would start. there is no reason for a stock 22re with a stock cam to be loping like its a built v8. your valves are more than likely too tight, causing them to not be able to close all the way. also might explain why the vacuum would bounce between 15-16lbs. it should sit steady. 15 lbs is where it should be at. do a valve adjustment!
