Questions tagged [sparkplugs]

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

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8
votes
4answers
76k 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?
21
votes
1answer
14k 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?
29
votes
9answers
436k views

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

What is the difference (besides price) between normal, platinum, and iridium spark plugs?
7
votes
1answer
51k 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
7k 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 ...
8
votes
1answer
5k 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 ...
8
votes
2answers
3k views

What Could Cause Flash Over / Arcing to Reappear on New Plugs?

I had been having some hesitation problems on my 98 Mazda 626 which after a great deal of research seemed to be solved by replacing the plugs: As you can see, there seems to be signs of flash over / ...
7
votes
1answer
1k 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 ...
2
votes
1answer
161 views

Best quicker faster acceleration NGK spark plugs

What kind of NGK spark plug can I use on my 1990 Toyota Conquest 2E for quicker start and for faster acceleration?
24
votes
7answers
7k views

How do cars drive through deep water as shown on many videos online?

I have read many warnings about driving a car through deep water. Some problems that this can cause is destroy the catalytic converter and in petrol engines water can cause damage to spark plugs. And ...
15
votes
2answers
109k views

How much does spark plug gap affect fuel efficiency?

I've read conflicting reports regarding how plug gap can affect fuel efficiency. For example, I've read that too small a gap won't cause a clean burn, or that too large a gap can cause misfires due ...
6
votes
1answer
108k 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 blue,...
5
votes
2answers
20k 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
votes
11answers
314k 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. ...
3
votes
4answers
13k 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 ...
10
votes
1answer
4k views

Ford F150 broken spark plug removal

I have a friend that has a 2003 F150 V8 3 valve V8 motor, when he went to change the spark plugs some of them broke off. How do you remove the part that is still in the head? Here is what a new one ...
8
votes
1answer
2k 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 ...
5
votes
2answers
4k 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% ...
5
votes
3answers
7k views

Lack of power when cold under load

EDIT 8: Final update, I think. Using an OBD scan tool, I saw that the fuel trims were still very low to adjust for the vacuum leak. I reset the ECU and the trims went back to around 0, and the engine ...
3
votes
1answer
222 views

Broken spark plug: safe piston?

I have a broken Spark plug in a 2SZFE engine. Oil level is not changing. Does it means the piston is safe? There’s a spark plug part in the first cylinder because previous owner chose a low cost ...
3
votes
1answer
4k 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 ...
3
votes
1answer
2k views

Coil Pack Location

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

spark plug problem in service

I took my car in for a routine annual service at a local garage. During the service, a piece of debris from a broken spark plug fell into the engine. The garage says it was 'just one of those things' ...
1
vote
2answers
138 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 ...
0
votes
0answers
69 views

what are possible indications that the spark plugs of my motorcycle need replacing?

Is there a way to find out, without taking the motorcycle to a garage, that the spark plugs need changing? In other words, if one or all of the sparking plugs of my motorcycle are worn out or need a ...