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

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1answer
5k views

How do I know when to change my spark plug

I ride a Piaggio scooter with a single cylinder engine. Recently I broke down and the engine wouldn't restart. It turned out the spark plug was stuffed. How can I ensure that doesn't happen again?
4
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4answers
38k views

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?
25
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9answers
245k views

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

What is the difference (besides price) between normal, platinum, and iridium spark plugs?
8
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1answer
89 views

How to check if spark plugs are firing? Coil-on plugs

While trying to diagnose a tricky car not starting problem I was asked to check if the spark plugs were firing at all. I've found plenty of resources on inspecting the condition of spark plugs after ...
5
votes
1answer
15k views

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 ...
4
votes
1answer
79 views

Should I change one spark plug and wire or all of them?

2 days ago I felt that something isn't right with my Ford. A mechanic told me that he wants to replace all four spark plugs and wires but could I just change the one? I'm scared that he's ripping me ...
22
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11answers
168k views

What happens if a single spark plug unexpectedly goes down in a multi-cylinder engine?

AFAIK vehicle manuals say owner must replace spark plugs every N miles. Suppose he fails to do so and a single spark plug unexpectedly dies in an engine with multiple cylinders right in a freeway. ...
7
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1answer
4k views

What does a healthy spark plug look like?

The spark plug pictured here: Has some black carbon on the underside of the ground electrode and has black carbon on the "base" area below the centre electrode (not pictured). Is this normal and ...
3
votes
3answers
6k views

Slow acceleration, high fuel consumption after spark plug change

I have a 2000 Ford Ranger 4.0 L V6 4x4 model. I recently was having some problems with the truck idling too low when cold and I decided to change the spark plugs. I put in 4 out of the 6 new plugs and ...
6
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1answer
115 views

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 ...
6
votes
1answer
104 views

What is spark plug heat range

I was watching a show and their project was adding a bolt on turbo kit. In the process they mentioned that they needed a colder spark plug. What does a hot or cold spark plug mean? What changes ...
5
votes
2answers
92 views

Is it necessary to replace functioning spark plugs?

I have a 2000 Mazda Protege that last had it's spark plugs replaced about 4-6 years ago (about 40k-60k miles). It's a commuter car, but it's a short commute and mild driving conditions; probably 85% ...
3
votes
1answer
557 views

Bottom piece of spark plug broke off in motorcycle engine

I was riding my 2005 RM125 dirt bike the other day when it bogged down all of a sudden. I noticed the spark plug had backed out of the head, thus causing the stall. I pulled the spark plug all the way ...
2
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1answer
909 views

Coil Pack Location

Where are the coilpacks located in a 1998 Buick LeSabre? Images would be most appreciated. Robert
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2answers
1k views

Need to know about spark plug

What is the most suitable spark plug for Toyota 3A engine in Asia? (NGK/Champion/denso/BOSCH and also copper/platinum or iridium) Please explain the differences/advantages between them and how it ...
1
vote
2answers
100 views

Will I get better performance with Brisk ZC plugs?

I was looking into Brisk ZC Multispark plugs. The design is interesting. it doesn't have a ground strap like regular plugs, nor is it one with multiple ground straps to get in the way of the flame ...