2004 SC Motor Ticking Question
I'd like to start off by saying my names Tony and i'm relatively new to the forum but not to owning nissans as we have several in our family. I currently own a 2004 Frontier S/C with 56k miles on it. About a week ago the engine started cutting out and misfiring ect. I figured it was due for a tune up so I replaced the plugs & wires, fuel filter, air filter, and oil change. This tune up did not clear up the issue so i was forced to change out the distributor which had gone bad. This got the truck back on the road however in about 100 miles the check engine light came on with several codes P0328, P0420, and P0430. I have noticed that the truck has significantly less power as well. I then started to notice the engine making a ticking noise. When I start the truck up cold she purrs like a kitten but as soon as it gets up to temp it starts to tick. The engine then ticks at low rpms and it seems to go away when I hit 2000 rpms. At that point I decided to check the oil which only had about 500 miles on it, and it was very dirty. I changed the oil but the tick is still there and the computer is still throwing the same codes. I'm just not sure what my next step should be. Any suggestions would be greatly appreciated.