That depends on the engine; find out what you have and include make, model and year of the car.
the plugs are numbered from in accending order from passenger side, rear of engine, 1, 2, 3, and then in the front from passenger side 4, 5, 6
your distrubator is numbered and your plugs if you start at the front of your engine toward the radiator the plugs are 2,4,6 and on the fire wall side the plugs are 1,3,5
The engine cylinders / spark plugs are numbered : passenger side of engine 1 , 2 , 3 , 4 from front to rear drivers side of engine 5 , 6 , 7 , 8 from front to rear The spark plug firing order is ( 1 - 3 - 7 - 2 - 6 - 5 - 4 - 8 )
On a 2001 C240 Mercedes, the cylinders are numbered from the front of the engine to the back. For the V6 engine, the numbering starts with cylinder 1 on the passenger side (right side when facing the car) and continues to cylinder 3, while on the driver's side (left side), it is numbered 4 to 6. This configuration is standard for most Mercedes V6 engines.
The plugs are under the coils on top of the engine. the cylinders are numbered 1-3-5-7 on the driver side 2-4-6-8 passenger side
The engine cylinders / spark plugs are numbered 1 , 2 , 3 from front to rear on the passenger side of the engine and 4 , 5 , 6 from front to rear on the drivers side of the engine -------------------------------------------------------------------------------------------------------- The coil pack towers are numbered 1 , 2 , 3 from front to rear in the row of 3 nearest the passenger side and 5 , 6 , 4 from front to rear in the row of 3 nearest the drivers side ------------------------------------------------------------------------------------------------- The spark plug firing order is 1 - 4 - 2 - 5 - 3 - 6
The spark plugs / engine cylinders are numbered 1 , 2 , 3 from front to rear on the passenger side of the engine and 4 , 5 , 6 from front to rear on the drivers side of the engine
Pass side front to back 2-4-6-8 Driver side front to back 1-3-5-7
The 2001 Toyota Tundra with a 4.7-liter V8 engine has eight cylinders, numbered from the front of the engine to the back. The cylinder numbering typically follows a pattern where cylinders on the driver's side are numbered 1 through 4, and those on the passenger side are numbered 5 through 8. This configuration is standard for most V8 engines.
The spark plug firing order is ( 1 - 3 - 4 - 2 ) The engine cylinders are numbered 1 , 2 , 3 , 4 from front to rear The COIL PACK TOWERS are numbered : 3----1 2----4----------( wires to spark plugs on exhaust side ) ------------------------------------------------------- 4-----2 1-----3----------( wires to spark plugs on intake side ) ( front of engine ) According to the ranger station . com ( no spaces )
See the Related link below for a diagram showing the locations and numbers of each tooth.
The COIL PACK TOWERS are numbered : coil----3---4 pack---2---6 plug----1---5 The engine cylinders / spark plugs are numbered : passenger side of engine , front to rear , 1 , 2 , 3 -----drivers side of engine , front to rear , 4 , 5 , 6 The spark plug firing order is ( 1 - 4 - 2 - 5 - 3 - 6 )