While you should buy spark plugs in matching sets for your vehicle, not all spark plugs are universal. Spark plugs come in different sizes with different gaps and are manufactured using a variety of metals. Finding the ones that you need can be difficult.
Does it matter what kind of spark plugs you use?
The most important detail in a spark plug is matching your engine’s design. Copper has high conductivity and low price, but also a shorter lifespan. Harder platinum and iridium cost more, but were designed to last longer, but remember, the best fit is always the one designed for your engine.
Can you use a different spark plug?
In other words, any brand of spark plug can be used in any vehicle make or model application assuming the plug has the correct dimensions, design and heat range. The engine won’t know the difference. … They may not have a plug with the correct electrode configuration, reach or heat range.
What happens if I put the wrong spark plug in my car?
If the electrodes are broken off or flattened, it is likely that the wrong spark plugs are installed. A spark plug that is too long can cause extensive damage to your engine while a short spark plug can cause poor gas mileage and spark plug fouling.
Is there a difference in spark plugs?
A standard spark plug typically features a nickel-alloy outer material fused to the copper-core electrodes. Copper spark plugs run cooler and provide more power in performance driving situations. … Copper spark plugs are also often used in older (pre-1980s) vehicles with a distributor-based ignition system.
Which is better Denso or NGK Spark Plugs?
Denso plugs are installed on almost every automobile model manufactured in Japan. The iridium used in them has a superior hardness. The electrode’s diameter in these plugs shrinks more than an NGK. For this reason, Denso plugs won’t last longer than NGK units but they will be better at producing powerful sparks.
Do spark plugs increase horsepower?
In short, yes, in some situations spark plugs can increase horsepower. The theory behind spark plugs increasing horsepower is that by providing more spark to the firing tip of the spark plug, it will (and does) combust more fuel. …
Is it bad to have mismatched spark plugs?
Misfiring due to excessive heat, quenching, increased fuel consumption and even engine failure can occur from the use of incorrect or mismatched spark plugs, so it’s best to replace all of your spark plugs at the same time, and with the correct type of spark plug, to ensure smooth and consistent operation.
What spark plug gives the most horsepower?
Best Spark Plugs for Horsepower
- Denso (4504) PK20TT.
- NGK 3403 G-Power.
- ACDelco 41-962.
- NGK Iridium IX.
- ACDelco 9748RR Wires.
Do expensive spark plugs make a difference?
This would be more accurately described as “less performance loss.” Spark plugs do not increase the performance of an engine — even spark plug manufacturers are fairly forthright about that. … They won’t make the engine perform better than it did when it was new, but they will help it stay at that level longer.
What does it sound like when spark plugs are bad?
That sound is caused by your spark plugs not detonating properly and igniting all the fuel. The fuel and vapor that did not ignite eventually will catch fire and detonate. When that happens, you hear a knocking sound from your engine. Bad spark plugs are common causes of engine knock, but simple to fix.
Why does my car shake after I changed the spark plugs?
Shaking or vibration may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires. Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal idling RPM which may also cause the motor to shake or vibrate more than normal.
Can you use the wrong spark plug in an engine?
Each type of spark plug has a different internal resistor depending on the vehicle and the engine specifications. … Fitment of a spark plug with a different resistor to that recommended by the manufacturer can result in poor engine performance and permanent damage to components in the vehicles electrical system.
Does upgrading spark plugs make a difference?
That translates to better combustion, lower emissions, better fuel economy and more horsepower. Lower your costs. It’s true – buying an upgraded plug does cost more than a basic spark plug. Iridium plugs cost on average $3-$4 more per plug, which only costs you $16-$32 more for your entire engine.
Do Iridium spark plugs improve gas mileage?
Iridium spark plugs give you even better gas mileage, performance, reliability, and longevity than double-platinum plugs. … Iridium spark plugs are perfect to use on high-performance engines.
Are NGK Spark Plugs pre-gapped?
While most NGK spark plugs are pre-gapped, there are occasions when the gap requires adjustment. Care must be taken to avoid bending or breaking off the fine-wire electrodes. NGK recommends a round wire-style or pin gauge gap tool to measure the gap.