OK have a 2005 chevy avalanche 323 vortec. You can feel the miss around 40-55 mph have redone the plugs and wires maf sensor replaced o2 sensor still the problem presist have not checked vaccum yet but good lord I don't know what else to do. Was thinking of try to replace the throttle sensor next but would like to know what you all think anything would help

 

is there any codes? do you have access to a scantool to narrow down what cylinder is missing?

 

We checked the odm said it was a maf sensor replaced it I'm thinking it'sthe tourque converter will update