This cylinder is designated as the #1 cylinder. The first cylinder on most Chevrolet engines is located on the driver’s side, or the left part of a vehicle if it has a rear-wheel-drive configuration. How are cylinders numbered in 4.3 Vortec? The cylinder sequence on the motor for the driver’s side, when seen from the front to the rear, is 1, 3, and 5, while the arrangement on the motor for the passenger’s side is 2, 4, and 6. The one on the other side is cylinder number 2, and it’s the one in the middle. When facing the front of the vehicle and gazing at the engine, the cylinder with the number one corresponds to the first one on the right. Try Inline 4 Firing Order What are 4.3L Vortec Cylinder Numbers? The next plug wire in the cap would be routed to the next spark plug in the firing sequence for that engine, and the direction in which the distributor turns which is either clockwise or counter-clockwise would determine which direction the distributor runs in. This may be checked by removing the distributor cap and looking at the number one spark plug connection. During the compression stage, the distributor rotor should line with the number one ignition system wire in the distributor cap. If an engine has a distributor, the route that the ignition coil wire takes from the distributor cap to the ignition systems for each cylinder is what determines the firing sequence of the cylinders in the engine. The manner in which the ignition leads of an engine are lit by the ignition system is referred to as the firing order of the engine. What is the relation between firing order and distributor rotation in 4.3 Vortec?Ĥ.3 Vortec firing order and distributor rotation will be discussed here. INTAKE MANIFOLD AND FUEL RAIL TORQUE SPECĬheck 16 Cylinder Engine Firing Order Firing order for similar vehicle Torque Specifications TIMING TORQUE SPECSĬamshaft Retaining Plate Bolts Torque spec So, 1994 4.3 Vortec firing order, 1995 4.3 Vortec firing order, 2002 4.3 Vortec firing order, and 2004 4.3 Vortec firing order are all the same. The 4.3 TBI firing order is also the same as above.įor a long number of years, this firing order has been unchanged. The firing sequence is determined by moving clockwise around the distributor. The first cylinder on the distributor cap may be found on the top side of the cap.

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