To Fire on the right order
Depends on engine and manufacturer.
what engine do you have in your impala?
The timing for a 460 Ford engine is 14 degrees before top dead center. The engine should idle at about 600 rpm.
Inner dead center refers to the position of a reciprocating engine's piston where it is at the top of its stroke at the innermost point of the cylinder. This position is important for timing adjustments and engine maintenance.
8-10 deg. before top dead center
0 TDC. Top dead center
It is 0 degrees at top dead center ( TDC ) With engine warm.
It is 6 degrees before top dead center.
Should be 12 degrees before top dead center
0 TDC / Top dead center.
Should be 12 degrees before top dead center
6 to 8 degrees before top dead center.