Motor Vehicle Maintenance and Repair Stack Exchange
Motor Vehicle Maintenance and Repair Stack Exchange

Questions tagged [sparkplugs]

spark plugs are used to ignite the fuel-air mixture in a petrol/gasoline engine.

285 questions
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What is the difference between normal, platinum, iridium plugs?

What is the difference (besides price) between normal, platinum, and iridium spark plugs?
krumpelstiltskin
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How long would pouring a little oil into a spark plug well take to stop a car starting?

I realise this is a strange looking question! I'm in a country where many local mechanics unfortunately have a bad reputation for creating small problems while fixing other problems in order to get repeat custom. There's no real system of…
user56reinstatemonica8
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What is the proper way to extract a broken sparkplug?

When dealing with a car with aluminum head(s), what is the proper way to extract a broken sparkplug?
NoCarrier
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What is the effect of different spark plug electrode tip diameters?

When choosing spark plugs one has a lot of options. One of the differences is the diameter of the electrode tip - some spark plugs have a large flat tip, and newer models often have a really thin tip. There are many options in between as well, I've…
I have no idea what I'm doing
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How to diagnose a bad spark plug?

What I always did up to now to check if my spark plug was doing fire : Remove it. Keep it plugged into the spark plug cable. Ground it on the frame. Start and check if sparks happen. If they are blue, the spark plug is ok. Else if the sparks are…
Jean-François Savard
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How can I adjust gaps to spark plugs?

Have a couple spark plugs that needs adjusting. Whats the best practise for this? Is this valid? http://motorqa.com/question/8/whats-the-best-way-to-adjust-gap-in-spark-plugs
PerT
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Gapping New Spark Plugs from the Dealership

In general, if I buy plugs from a dealership which looks up which plugs I need based on my cars VIN or license number, do I need to worry about checking the plugs gap, or can I just assume they will be properly gapped out of the box? After seeing…
Robert S. Barnes
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What do the colored rings on spark plugs mean?

On the white part of spark plugs there are those colored rings. In amount ranging from 0 to 4. What does the amount of rings refer to? And what does it's color refer to? Is it just aesthetics?
Andreas Furster
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What spark plug gap to use for old 5HP briggs and stratton

I am doing some maintenance on a ~25 year old garden tiller with what I believe to be a 5.0 HP Briggs & Stratton motor. I have no manuals for this thing. Cars I have worked on have had spark plug gaps from .026" to .090". Out of the box, the…
Rodney Schuler
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What is the difference between normal, platinum, iridium plugs in petrol/LPG vehicle?

This question was related with this What is the difference between normal, platinum, iridium plugs? Is there any difference if petrol vehicle is converted to liquid propane gas (LPG)? In my case I have Volvo with engine B5254T The B5254T is…
Guntis
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Metal object in spark plug hole

When removing the old spark plugs from my CB500S, I managed to snap an old spanner which I was using on the spark plug tool. The small piece of metal has fallen into the hole and is now next to the spark plug. I've bought a magnet on a flexible…
Oliver Jarvis
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Sparkplug ground electrode burned off

2010 Ford F-150 5.4 3valve did a tuneup changed sparkplugs and coils with correct Motorcraft plugs and AC Delco COP’s now I have burned off 2 ground electrodes in less than 100 miles. No codes on the computer or mis-fire information from my code…
Keith
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What is a spark plug terminal nut?

What is the role exactly? Lets say for example i put a studded terminal spark plug on a non loose spark plug in a vehicle, what would happen? Does it effect the way the current and voltage flow?
DeusIIXII
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Spark plug tips are breaking/melting or falling of my Bosch Platinum Plugs

After 150,000 on the original factory plugs I replaced them all with Bosch Platinum, single tip, plugs. After a couple of months my car began to idle roughly at stops but not always. Then one day it got so bad the check engine light went on and…
andrew
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Broken Spark Plug removal

I have a 2002 Chevy Venture, that supposedly the Mechanic changed the spark plugs, but when trying to do a tune-up one of the Spark Plugs broke off and the electrode is still in it. I found online a lot of Spark Plug extractors for Fords, but, none…
gerardo
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