1989 Ford f150July 31, 2015July 31, 2015Why does my truck run rough Share Tweet Pinterest Keywords:F150 1 thought on “1989 Ford f150” Freeautomechanic August 3, 2015 at 9:11 am There could be several reason from needing a tune up to bad fuel. So lets see if we can narrow it down a bit. First thing to do would be to pull any check engine light codes. The good news is you can do this yourself. Once you have pulled the codes, post them below in the comments. How to Retrieve Ford Check Engine Light Codes Comments are closed.