What gap should my spark plugs be?
Usually . 035″ is around the best gap, even though many instruction manuals say to open your gap to . 045″. Go ahead and try that, but when it doesn’t run as good, or it drops cylinders at high RPM because that wider / weaker spark can’t light the cylinders consistently, you’ll know why.
What happens if spark plug gap is too wide?
If the spark plug gap is incorrectly set, it can lead to engine issues. Too small of a gap may give too weak of a spark to complete the combustion process within the engine; too wide of a gap can lead to the spark plug not firing correctly, causing misfires at high speeds.
What should the spark plug gap be on a Toyota Corolla?
The new iridium tipped spark plugs should be pre-gapped at 0.044″ from the factory. It is still a good idea to check that the gap is correct using a spark plug gap gauge disc. If the gap is not very close to 0.044″, exchange the plug for a new one.
When to replace the spark plugs on a Toyota?
Pulling the spark plugs will make it obvious if replacement is needed — damage on the plugs is usually very obvious. When you’re ready to replace your spark plugs at the regular interval, or if they have become damaged, start your search here for high-quality Toyota replacement plugs.
Why do Toyota spark plugs have an you shaped groove?
The name explains the design of this plug — it uses a U-shaped groove in the ground electrode. This u-groove traps the air/fuel mixture before the spark plug fires, making for a large spark, reducing fouling, and making for more efficient combustion. Available for select models, this design has several benefits:
How can you tell if spark plug gap is correct?
It is still a good idea to check that the gap is correct using a spark plug gap gauge disc. If the gap is not very close to 0.044″, exchange the plug for a new one. Push the new spark plug in to the spark plug socket and make sure that the rubber insert or magnet holds it securely.