Understanding the Firing Order for Chevrolet Vehicles

The firing order of a vehicle is the order in which the spark plugs (and therefore the chambers) fire. This is true of any type of vehicle, whether it is a car, a van or an SUV. The firing order needs to be maintained in order for the vehicle to run properly, and in some cases where the firing order is disrupted, the car may not run at all. At the very least, the car may experience poor performance. With that in mind, the following article offers a look at the firing order for Chevy vehicles.

Are There Different Firing Orders for Different Vehicles?

The firing order for vehicles varies based on several factors. The first is whether the vehicle is a front-wheel-drive or rear-wheel-drive engine. The next factor is the number of cylinders in a vehicle, which is followed by the engine type, such as small block or big block. Finally, the liter size of the engine is the last factor that can affect the firing order. No one of these items is more important in terms of determining firing order, as they are simply means of categorizing engines with the same firing order.

What are the Firing Sequences for Chevy Rear-Wheel-Drive Vehicles?

Rear-wheel-drive Chevy vehicles that have a small block engine follow the firing order 1-8-4-3-6-5-7-2, and this firing order is the same for small block rear-wheel-drive cars as well. For Chevy vehicles that have 5.7 to 7.0 liter engines and rear-wheel-drive, the firing order is 1-8-7-2-6-5-4-3. In addition, a straight six follows 1-5-3-6-2-4, while a slanted six follows 1-2-3-4-5-6. A four-cylinder vehicle, on the other hand, follows the sequence 1-3-4-2.

What is the Firing Order for Front-Wheel-Drive Vehicles?

A four-cylinder Chevy with front-wheel drive follows the firing order 1-3-4-2. Most six cylinders that are front-wheel-drive and from Chevy follow a firing pattern or 1-6-5-4-3-2. The exception to this pattern is the 173, which follows a 1-2-3-4-5-6 firing order.

What Else is Important to Know About Chevy Firing Orders?

The engines included above only include the models that are currently used by Chevy. This list and the firing orders that are contained within it are not indicative of what the future firing orders for Chevy vehicles might be, and it also does not include any Chevy engines that are no longer in circulation. If you have any questions about your particular Chevy engine’s firing order, you can reference the owner’s manual or contact the manufacturer for more information.

A car’s firing order is something that needs to be maintained in order for the vehicle to function properly. Generally speaking, unless you are an auto mechanic, you will not have to worry about your vehicle’s firing order too often. However, the main time that the average DIYer will need to worry about the firing order of the cylinders is when he or she is changing spark plugs or wires. If the wires are not placed back into the proper chambers, it can throw off the firing cycle. Be mindful of this and, unless you are taking the engine apart, you should be fine in most cases and not have to worry much about your vehicle’s firing order.