1997 truck/hesitating sputtering especially in higher gear/speeds. CEL illuminated and pulled codes P0301 and P1316. I initially thought fuel pump problem, but I suspect may be bad plug wire. Sprayed water on wire 1 emits blue light show... Would any other malfunction be the culprit for these two error codes? If not then I'd Like to know the cheapest place to find a good set of plug wires if someone can help out. Also, can an amateur like myself change the plug wires on a Disco I without too much of a headache?...Looks like a pretty tight squeeze.