So I have a 95 4.3 and i keep gitting the multiple misfire code. So i changed the dis cap because #3 looked discolored. The plug wire for #3 had corrosion. I did not have time to get new plugs and wires at the time so i just scraped off the corrosion and put it back on. My question is, would scraping of the corrosion work, do i need new wires and if the wire on #3 looke dbad can i assume the #3 spark plug is bad? Also is there any thing else that could bring up the p0300 code? like vacume lines. If it helps I had a egr valve code a while ago but i cleaned it out and put it back in. Now i just get the p0300 code[:@]. Thanks for your help.

 

Still haveing problems?

 

Yeah im still having issues. I put new plugs and wires in but im still getting the p0300 code. Could use some help on this one. Thanks.