My check engine light came on and the code it spit out was p0305 which is a cylinder 5 misfire. I need to figure out where the problem is. The 2500 4x4 idles rough, has a low rpm when idling, drives with less power than before, is difficult to accelerate quickly and gets even worse gas mileage than before. Other than slightly less power when driving, it drives fine. The engine sounds a little off, but not terrible. I have replaced the spark plugs, tested the plugs and wires, replaced the fuel pump and filter, and did a compression test. Everything I have done hasn't made a difference. The only thing I noticed is very shortly after changing the spark plugs, I pulled a few out and only one was black and sooty in the 5th cylinder. I need to know what to test/clean from here. I've heard of checking and cleaning the EGR valve, but that is the only next step I can think of. I need to fix my truck! Help!
have the same problem?
Saturday, September 21st, 2013 AT 3:57 PM