Q: misfires cannot detect?

Iv changed the resenator, catalytic converter, coil packs, spark plugs, wires changed oil cleaned the egr valve and ignition module and it still misfires in a 2004 chevy impala 3800 v6

Q: car misfires cannot detect?

Iv changed the resenator, catalytic converter, coil packs, spark plugs, wires changed oil cleaned the egr valve and ignition module and it still misfires