I just recently purchased a 1992 F-150 4x4 with 5.8 351 engine with about 97,000 on it. I've been driving it around now for about a week now and one of the only things I notice is that when I am going 1-15 mph it runs pretty rough. Almost a stalling feeling but again it has never stalled. Slowing down is the same thing until I get to a complete stop. While stopped it idles fine. It has always started up fine as well. Any ideas or do you need any more information?

 

buy some sea foam and pour it in your vacuum line. Good on rough idles.