LS Firing Order and Cylinder Numbers [Diagram]

You can learn about the LS firing order in which a spark is delivered to the cylinders of an LS-series engine, which is used in General Motors vehicles. In this post, you can understand every kind of engine functioning, affecting everything from exhaust flow to ignition timing.

Also, check Chevy Block Casting Numbers: Full List

What Is The LS Firing Order?

The LS firing order is a technique in which a spark is delivered to the cylinders of an LS-series engine to ignite the air-fuel mixture. The firing order for the majority of LS engines is 1-8-7-2-6-5-4-3. This shows that this is the order in which the cylinders fire.

You must keep the knowledge about the engine functions and how it works properly because a wrong firing sequence can cause poor performance and also cause misfires.

LS Cylinder Numbers

The LS engine has a different sequential number that plays a vital role and runs from front to back. The bank on the driver’s side is numbered 1-3-5-7, and the bank on the passenger side is numbered 2-4-6-8.

On the driver’s side, cylinder 1 is located near the front of the car, and this is a resource for engine maintenance and diagnostics.

The cylinder numbering is very helpful for detecting problems like troubleshooting misfires and adhering to engine manual repair instructions, and also helpful for how to solve this problem.

A clear diagram and directions on cylinder numbers are helpful if you are unsure about it. Also, the diagram is shown below:

4.8 LS Firing Order And Cylinder Numbers

4.8 LS Engine Overview

The 4.8 LS Engine was introduced in 1999, and its production continued until 2007. The 4.8 LS Engine is the first engine of the LS Generation III. It is the efficient engine that is commonly referred to as the Vortec 4800 or LR4.

Durability and Reliability

It is efficient in work, and its durability and ability are excellent. These engines are still a practical choice because of their reputation and work.

Upgradability

Upgrades for the 4.8 LS Engine include nitrous oxide systems, performance cams, cylinder head improvements, turbochargers, superchargers, and sophisticated intake systems. It can generate up to 1000 horsepower with the proper modifications.

Applications for Vehicles

A variety of car types were equipped with the 4.8 LS Engine, including:

• 1999–2006 Chevrolet Silverado 1500
• Tahoe model years 2000–2006
• Chevy Express (models 2003–2006)

4.8 LS Order of Firing

The LS firing order of the engine in a clockwise manner, like 1-8-7-2-6-5-4-3 same as all other LS engines.

4.8 Numbers for LS Cylinders

The cylinder numbering scheme is called Flod, so that’s why cylinders 1-3-5-7 are on the driver’s side while looking at your car from the front. You are closest to Cylinder #1. The cylinders on the hand are numbered 2-4-6-8, with cylinder #2 being the one nearest to you.

Chevy 5.3 (5.3 Vortec) Firing Order And Cylinder Numbers

5.3 LS Engine Overview

This 5.3 LS engine was introduced in 1999. It is mainly referred to as the Vortec 5300 or the LM7/L59/LM4. The Gen III of  Small Block Series 5.3 LS Engine is amazing and very sufficient in work. Its production was run on it from 1999 until 2007.

Sturdiness and Acceptability

Among Gen III, IV, and V LS Engines, many car fans believe the 5.3 LS Engine to be the most amazing and well-liked. A well-maintained 5.3 LS Engine from a salvage yard can still function well today, but some of these engines are still going strong after they have surpassed 100,000 miles.

Upgrade Compatibility

The 5.3 LS Engine has many capabilities, and its many components are upgraded, such as intake systems, high-flow cylinder heads, superchargers, turbochargers, and nitrous oxide, just like any other LS Engine.

Applications for Vehicles

In various vintage cars, the 5.3 LS Engine was available as an option, including:

• Silverado Chevrolet (1999-2007)
• Tahoe Chevrolet (1999–2006)
• Chevrolet Avalanche (2002–2006)
• Chevy Express (models 2003–2007)

5.3 Order of LS Firing

The firing order for 5.3 is 1-8-7-2-6-5-4-3, going clockwise.

5.3 Numbers for LS Cylinders

The fold cylinder numbering scheme is used. The driver’s side of your car is where cylinders 1-3-5-7 are located when viewed from the front. Cylinders 2-4-6-8 are located on the passenger’s side of the hand.

Chevy 6.0 Firing Order And Cylinder Numbers

6.0 LS Engine Overview

The Gen III 6.0 LS Engine, also called the Vortec 6000 or LQ4, was introduced between 1999 and 2007. This engine are very useful and becomes more common day by day.

Enhance Compatibility

It reacts favorably to modifications like superchargers, turbochargers, intake systems, performance cams, and high-flow cylinder heads, just like other LS Engines.

Vehicle Applications

This engine was fitted to several car models, such as:

• Chevrolet Suburban (1999-2004)
• Chevrolet Silverado 2500 (1999-2004)
• Chevrolet Silverado 1500HD (2001-2007)
• Chevrolet Silverado 3500 (2001-2007)
• Chevrolet Express (2003-2007)

6.0 LS Order of Firing

The regular 1-8-7-2-6-5-4-3 LS firing order for the 6.0 LS Engine is set in a clockwise manner.

Numbers for 6.0 LS Cylinders

The 6.0 LS Engine uses the fold-cylinder numbering scheme. The cylinders that are on the driver’s side are 1-3-5-7 when looking at your car from the front. The passenger side is home to the cylinders 2-4-6-8. Also, there are 1 and 2 opposite sides nearest you in that view.

Chevy 6.2 Firing Order And Cylinder Numbers

6.2 LS Engine Overview

A small block Gen IV engine, the 6.2 LS Engine, is also called the L92 or the Vortec 6200. It replaced the 6.0 LS2 with more oversized bores and more robust casting. Moreover, it may be upgraded with cams, superchargers, turbos, and other components.