wings66

1995 z28 different cam but still backfiring replaced wires plugs coil icm and water pump isn't leaking in the distributor. there is no codes and the check engine light does work. when it starts to warm up is when is starts backfiring and loss of power I was told that the egr valve was like the old style. meaning it activates when it warms up is this true WTF buttercup?