still need a little help?
Okay now that I have some answers I need a little more info as to how you run the diagnostics on the 87 420 SEL? Is there a tool that I can build on my own? I have heard a few of the people on this board that have built their own tool. And is there an area to tell me what these codes mean? I appreciate all the help I can get to diagnose my problems of stumbling!