Tip & How-To about GMC Blazer

Spark plugs and wires for tune ups.

Most cars now days have plugs that last 100,000 miles however they do need to be changed sooner due to the electrode stretching and the gap increasing thus causing a miss or poor performance, Spark plug manufactures sell all types of replacement plugs this is to save you money by telling you what I recommend on plugs.There are many plugs on the market called split fire plugs and their prices range from $4.00 each up to $14.00 each however these plugs do no better than the recommended plugs from the manufacture, with one exception Platinum plugs last longer. However never buy the expensive plugs unless you are burning oil and if you live in a state that you have to have emmison tag to get a new tag for your plates your wasting your time and money to install these expensive plugs. So always buy the plugs from the manufacture and do not buy after market plugs. Also when changing Plugs change the wires or you will damage the plug wires when you change the spark plugs. So replace the wires. Do to the high voltage on the newer cars use dielectric grease on each end of the new wire coat the inners boot of the plug wire so that there is no voltage leak between the wire and engine block, a dirty plug will cause leakage and make the car run rough and miss and could damage the engine. Put the dielectric grease on both ends and make sure it does not touch the tip of the plug or the tip of the coil it is connected to.

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2 Answers

What is the correct spark plug gap for NGK bkr6egp plugs?

Call any auto parts store and tell them what you have and they will tell you the gap setting

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What would be the best spark plug to buy for an 05 Equinox with 60,000 miles on it and what would the gap be?

!st let me say your engine is not due a set of plugs until 100,000 miles, and to change them any sooner is a waste of money.

If you still wish to replace the plugs use ACDelco Spark Plugs, here is the part number and gap.

ACDELCO Part # 41101 [Iridium]

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When do spark plugs need to be changed on a 2007 toyota 4 runner?

Nowadays, I've seen spark plugs last 100,000 miles. The center electrode in a spark plug will wear down, causing a wider gap between the center electrode and side electrode. This wider gap causes harder starts, and if wear is too excessive, it will cause a no start. Hope this helps, Gary

Jul 28, 2010 | 2007 Toyota 4Runner

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2002 Chrysler PT Cruiser 2.0L need spark plug gap for Champion copper plugs (470). Thanks

It is normal for the electrodes to wear as the plugs age. This increases the distance between the electrodes which in turn leads to a gradual increase in the firing voltage required to jump the gap. The gap on a standard spark plug grows about 0.00063 to 0.000126 inch for every 1,000 miles of normal driving, which means the firing voltage requirements creep up about 500 volts for every 10,000 to 15,000 miles of driving.

The OE Champion plug gap specifications are .048 - .053" or 1.24 - 1.37mm. in accessing and changing the plugs on the PT. They have the same gap specifications as the OE plugs. Most owners gap at .050. We prefer to use the Champion Double Platinum plugs, which are more durable, provide extended plug life, and reduce the need for maintenance, given the difficulty However, if you experienced excessive rough idle with your last set of plugs we suggest gaping the OE and DP plugs to .042 and consider replacing the OE plug ignition wires.

Excessive gap can cause performance and drive ability problems, including hard starting, an engine miss and or hesitation under load, and can shorten the life of the plug (accelerated tip erosion). If it were me I would re-gap them to the correct specs if they are currently gaped at .060.

Thank you for using Fixya.

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decreased fuel efficency

The basic things to do first is to make certain that your air filter is clean. You should replace your air filter at least every 12,000 miles or sooner depending on where you live. A better solution is a permanent air filter. A popular one is made by K&M and it just needs to be cleaned once or twice a year. Also, air flow is better with these filters so it could increase your gas mileage.

Spark plugs and wires are important, especially if you have over 50,000 miles on some on the newer cars (they rarely last the 100,000 miles they promise).

If you're using ethanol type fuel (you probably are), you'll notice a considerable drop in gas mileage. My minivan went from about 22 miles per gallon in the city to 17. The highway mileage went from about 28 to 24. Just from the change in fuel.

Other problems are best diagnosed by a knowledgable mechanic. There could be a leak in a vacuum line, time to replace the oxygen sensor (about 100,000 mile life), a malfunctioning sensor...and so on. The car's computer usually, but not always catches most of those.

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