To find the correct diagram, you must know the year, make, model, and engine displacement of your vehicle. Once you have this information, you can:
* Consult a repair manual: A Haynes, Chilton, or factory service manual specific to your vehicle will have the correct firing order and spark plug wire routing diagram. This is the most reliable method.
* Use an online resource: Websites like Chevrolet forums or parts websites (e.g., Summit Racing, Jegs) might have diagrams if you provide the specific details of your engine. Be cautious; ensure the source is reputable.
* Look at the distributor cap: The distributor cap *may* have the firing order printed on it. However, this isn't always the case, and even if it is, it's crucial to confirm with a reliable source.
Important Considerations:
* Firing Order: The firing order is the sequence in which the cylinders fire. This is critical for proper engine operation. A common firing order for many small-block Chevys is 1-8-4-3-6-5-7-2, but this is not universally true.
* Distributor Rotation: The distributor rotates, and the spark plug wires are connected to the distributor cap in a specific order corresponding to the firing order.
* Distributor Cap Orientation: The cap itself might have markings to aid in wire routing.
In short: Don't guess. Find a reliable source like a repair manual to obtain the correct spark plug wire diagram for your specific small-block Chevy engine. Using the wrong diagram can lead to misfires, poor performance, and potential engine damage.
