12 votes

Where do spark plugs get their electricity?

From a device called a coil. The coil is basically a transformer which takes in the 12vdc voltage from the battery and upconverts it to around 40k vdc (depending on the ignition system). Here is a ...
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5 votes
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What kind of wear does a spark plug cable go through?

Spark plug cables can suffer from a few different things: cumulative heat stress from being near the engine cumulative electrical stress from the high voltages they carry chafing against nearby ...
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What is gained with "performance" spark plug wires?

There isn't any performance to be gained from spark plug wires, just better build quality, which gives you not a better spark, but rather maintains an appropriate spark for more miles/years before ...
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5 votes

What is gained with "performance" spark plug wires?

Here's an article that explains spark plug cables. It had some interesting information that I hadn't really thought of. That said, I'd say the largest difference in consumer grade spark plug cables ...
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5 votes

Is it necessary to change the leads when changing spark plugs?

It is not necessary to change the wires but it's a good idea. Here's the reason. If your spark plugs have been in the engine too long the component at the end of the plug get's oxidized over time from ...
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Small spark can be seen after replacing spark plugs

Visible sparks are not ok. I'm not familiar with your particular plug wires, but that normally means the insulation or wire connector is damaged. If you see a spark, at a minimum it means that you'...
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Fourth piston isn't sparking so car is losing power

I am pretty sure the spark plug is broken but I am not sure That's almost certainly the issue. Replace the spark plug and try again, if the problem is fixed, you're all set. If not, then there are ...
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Testing for a misfire

Nope... If you don't have 'coil on plug signal probe' you can measure the coil induced magnetic field in conjunction with for example the ignitor's trigger signal. Although, this can only be done if ...
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3 votes

What is gained with "performance" spark plug wires?

From many years of selling both 'standard' and 'high-performance' HT lead sets, here's my advice: If you're replacing your lead set because it's simply time to do so, buy the cheap ones: they're ...
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  • 551
3 votes

What is gained with "performance" spark plug wires?

As @tlhIngan said, the benefit of good wires isn't so much the quality of the spark when they are new, but the longevity of the wires. Spark plug wires don't lead an easy life, they are exposed to ...
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2 votes

Ignition coil replacement

Changing the plugs is just fine. Coils are not maintenance. They are replaced as they fail. You might find it more beneficial to find the maintenance schedule for this vehicle and catch up on the ...
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What are the pros and cons of using distributor per bank vs single bigger distributor on a dohc v8 for example?

Well the play in both causes the timing to drift between the two banks when there are two distributors. A single distributor with either one or two sets of points is easier to time - especially if you ...
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Ignition coil replacement

Effectively speaking, some automotive parts slowly wear or fail in a way that is predictable. For instance, we know that oil filters collect debris over time, so it's easy to predict when you will ...
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  • 1,124
1 vote

Driving with spark plug that was completely loose

Please make it clear: disconnected or loose? Disconnected meant a permanent misfire, which may not cause much damage to the engine, except possibly faster wear on the bore. Loose on the thread may ...
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Can spark plug wires affect fuel consumption

In general no. Poor spark would likely make the engine run horribly, misfiring noticeably. But badly routed cables / poorly suppressed cables can interfere with the electrical signals from various ...
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  • 561
1 vote

Can spark plug wires affect fuel consumption

Unlikely, Although technically very cheap spark plug wires could cause a weak spark, it would typically not effect combustion efficiency by enough to notice a drop in fuel economy. Typically if you ...
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1 vote

Can spark plug wires affect fuel consumption

Indirectly. Cheap wires have higher resistance in the wire, which leads to weaker spark at the plug. Weaker spark means the combustion is not optimized, thus leading to less engine power and you ...
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  • 21
1 vote

Spark jumping off wires and into any ground near them. Wires are new

Really sounds like bad wires to me. The arcing means that there is an easier place for the spark to jump to ground than at the spark plug where it should be happening. Maybe the wires you are ...
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1 vote

Two spark plug wire failures in two days?

The plug wires all tend to have the same age and have suffered the same conditions. As the insulation gets dirty, then it becomes more susceptible to moisture and subsequent breakdown. Whenever I ...
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After mechanic work, car starts fine but accelerating stalls the engine

In this case it turned out to be the MAF Sensor, which I cleaned with mass air flow sensor cleaner. Being a newbie to this, I used this video to help me figure out how to do it to my Lancer. My ...
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  • 153
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Ignition coil upgrade

Maybe you should reconsider the "upgrade" part of your sentence. For a commuter bike it will make no special difference to upgrade only the ignition so i believe you would be better of to target ...
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  • 1,005
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Does starting the engine with one of the spark plug wire disconnected damage the starter coil?

No. The reason your other friend incorrectly said that is because if a charged plug was touching a ground (the frame or whatever) that's a short over a device designed to produce a high voltage, ...
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1 vote

Should bikers keep one spare spark plug in kit always?

I'm going to answer this more generically than what you're asking, but hopefully it will help. In general, bring whatever you think you'll need. If that need is a sparkplug and you can fit it in your ...
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1 vote

What kind of wear does a spark plug cable go through?

I've had the connector that mates to the top of the plug fail before. This caused an intermittent misfire and general poor running that weren't fixed by new plugs -- then I looked at the ends of the ...
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What kind of wear does a spark plug cable go through?

The most common type of spark plug cables is carbon core wires. In this kind the carbon eventually burns away and the wires can no longer transmit a good signal. If you don't have carbon wires, the ...
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