Depends on engine and manufacturer - please be more specific.
1-4-3-2 is the correct firing order.
if you mean firing order , it is written on the inlet manifold
need cylinder order for 351 wins
1-3-4-2
what are the location of number 1 to 8 piston in the fire bird v8 and the rotation of the distributor and its firing order... in the cap...
Firing order is 1-2-3-4-5-6 with number 1 cylinder at right front.
#1 piston must be at TDC / Top Dead Center on the compression stroke.
1-5-3-6-2-4
what is the firing order for 1990 chev trans sport and where is number one piston locoted
Because the spark plug must fire when the piston is at top dead centre of a compression stroke. If the plug fires when the piston is at any other position then you get backfiring etc and no start. The correct firing order ensures the plugs fire at the right time.
Without knowing what engine manufacture and size you are asking about it is impossible to answer as there are 5 different firing orders for 4 cylinder engines.
Align the piston number 1 (in firing order) at its bottom most position.