Misfire

[Mark l day]

I have a 2001  chevy silverado 1500 with the Ls 53 v8 and I have been getting  a misfire  code for the last 2 moth First, it started out as a multi cylinder misfire to cylinder 5 misfire. And I've changed Fuel injectors, spark plugs, and wires. After changing all that, it went from the cylinder 5 two cylinder 8 misfire And if I unplug my. Mass air flow sensor the cylinder 8 in the spirit goes away. And I also changed the coil to see if it would change. And it still misfire 

 

[asilverblazer]

One at a time swap plug, wire, coil, injector, plug wire from cylinder 1 to cylinder 8. One of those components will take the miss fire with it from 8 to 1, this is the component that needs replaced. 

 

Otherwise you are looking at a mechanical problem specific to cylinder 8.

 

Non AC/Delco parts are suspect of being no good out of the box.

[thx1138v2]

Go to to your auto parts store and pick up a spray can of "Mass Air Flow sensor Cleaner" ($12.00) and clean the Mass Air Flow sensor by spraying the grid with it. Give it a couple of minutes to evaporate and put it back together and try it again.