Inspecting the condition of the spark plugs in your 4runner can help you determine the health of the engine.

Toyota 4runner spark plug replacement interval. Pull up on the hood release latch found under your steering wheel. I'll be changing that now every 30k also. There are two types of spark plugs:

They will not need replacement until 120. Yup, and if you are a visual guy, here is a quick youtube vid on 3.4l 4runner spark plug replacement : The standard spark plugs in the 2004 4runner v8 are 120k iridium plugs.

I copied and pasted this from another 4 runner forum: More often than not, your engines computer will be able to detect bad spark plugs in your. The replacement of the spark plugs themselves.

I'm coming up on my 3rd spark plug change with the 4runner later this summer and i'm debating. While most toyota experts in the cincinnati area will recommend having your spark plugs replaced every 30,000 miles, it will vary based on your specific model. Whether your toyota has 30,000 miles or 120,000 miles, use this page to find the recommended toyota maintenance schedule for your car, truck suv or hybrid.

The grommet was so hard and brittle. A spark plug is like a canary in a coal mine for the engine.