Need help!! 04 silverado 4.3 problem
 

Ok I really need help. It started about a month ago. It sputtered every once in awhile then progressively got worse check engine light came on so I took it to auto zone and got a random misfire code. I changed the fuel filter didn't help. Then two days later it wouldn't even start. I changed the plugs about 1k miles before without changing the wires so tonight I changed the wires. Seems to be getting fuel and as far as I can tell its only sparking randomly on different cylinders. The catalytic converter was replaced about 10k miles ago.


Please help!! Don't really want to take it to the dealership!

Have your fuel pressure checked.