NGK 6619 Iridium IX Spark Plugs snagged the top pick in our spark plug comparison because they offered the best mix of high-performance, fuel efficiency, durability, and dependability. Featuring an iridium construction, these high-quality spark plugs provide a longer lifespan than copper and platinum spark plugs.

Replace one plug wire at a time, then you don’t have to worry about mixing up where they all go to, since you’ll only ever have one place to put the new wire. yes it matters. just change each one, one at a time.

On an inline engine: the number one cylinder is located at the front of the engine, closest to the timing cover. On a V type engine: one cylinder head is slightly forward of the other, toward the front of the engine. Cylinder number one is the forward most cylinder in that bank.

1. Editor’s Pick: ACDelco. ACDelco offers a variety of spark plug wire sets for a wide range of applications and vehicles.
2. NGK.
3. MSD.
4. JEGS.
5. Denso.
6. Bosch.

I have used Taylor plug wires for years and you can not go wrong with the reliability and durability of Taylor wires. Definitely recommend!

8mm spark plug wires are a heavier gage wire than the 7mm type. The thicker wire has a thicker core. The core is the part of the wire that brings power to the spark plugs. A more robust core provides a lower resistance path for the power, thereby allowing more power to reach the spark plugs.

For overall spark transfer, not necessarily. However, thicker wires, like these Moroso Super Max II 11mm wires, can provide added RFI suppression and insulation. That’s why it’s important to select a good quality set of spark plug ignition wires to deliver juice to your spark plugs.

The short answer is Yes, when you replace the spark plugs and wires can increase your vehicle’s performance. New spark plugs help keep your engine at its peak performance and efficiency levels. Worn or dirty spark plugs require higher voltage to get a strong enough spark to start a vehicle.

Most manufacturers recommend an 8 or 8.5mm plug wire on most applications. Exceptions would be an all-out race car or a street rod where EMI/RFI suppression is not a concern, but weight and appearance are. In which case, a 5 or 7mm wire might be a better option.

It still has pistons that go up and down, just like a car in the 60s. I am just guessing here, but I think that the answer to the question is YES. Yes, it does. Voltage drops as length of the conducting wire increases, so it’s best not to have the wire any longer than necessary.

These wire are extremely high quality. When tested with an ohm meter prior to installation, they registered @28 ohms. The stock wires were Delco, and registered over @800 ohms.

Common signs of failing spark plug wires include a decrease in power, acceleration, and fuel efficiency. In addition, the engine light coming on or visible damange to the cables can be signs of a failing wire.

Screwing up the plug wire order would cause cylinder misfires, and the unburned fuel usually flow out to exhaust and potentially damage the O2 sensors and Cat – but should not happen with only few seconds of cranking the engine.

If you put the wire for, say, spark plug 1 onto the top of spark plug 4, spark plug 4 is now going to fire at the wrong time. If it fires when the intake valve is open, it could set fire to the fuel-and-air mixture that’s waiting in the intake manifold and the throttle body.

It is not necessary to change the wires but it’s a good idea. Here’s the reason. If your spark plugs have been in the engine too long the component at the end of the plug get’s oxidized over time from having such high voltage run across it to jump a gap and create a spark.

The ignition cables on a car are made to last about 60,000 miles before they have to be replaced. In some cases, the wires will need to be replaced due to the rubber boots on the end getting damaged and now allowing for a good connection with the spark plugs.

The plug contains three wires – the live, neutral and earth wires. In a plug, the live wire (brown) and the neutral wire (blue) are the two wires that form the complete circuit with a household appliance. The earth wire (green and yellow) does not normally form part of the circuit and is included as a safety wire.

Connect the black wire to a brass screw or terminal on the plug and the red wire to the other brass screw. Attach the white wire to the silver screw or terminal and the ground wire to the green screw.