They should be gaped to the proper space. They work better.
Usually you use a gapping tool reaqdily available at auto parts stores. Most have different size pieces to measure the gap size and a U shaped cut out to fit over the outer electrode to bend it out or in to set the gap to proper size.
So measure, if too much space then bend outer electrode in towards centre and if too little then bend the outer electrode out to proper space.|||most plugs come pregapped but a gapper is good just to make sure.|||check them for gap
you can do this with feeler gauges the distance will be in your handbook|||old or new car, it takes only a few seconds to properly gap your plugs. It is a cheap insurance for proper ignition.|||Yes, please gap your plugs.
The gap is what is causing that spark and making your car run smoothly.
You can buy a gapper at Walmart, cheap.
if in doubt, have a shop do it. its important.|||My husband is an auto parts store manager. He says you need to gap them sometimes. You buy a tool for that at the auto parts store. It looks like a coin and the end varies in thickness in order to gap plugs at different sizes.|||u should gap them but in the real world most just look to see its not been droped...some platnum plugs shound NOT b gaped as it chips the platnum,|||Spark Plugs come with an ideal gap for that plug, changing the gap could cause weak spark, missfire, high fuel consumption etc..................just put them strait in but be carefull not to over tighten as they do crack and break......should be finger tight then just nipped up!!|||They are close out of the box, but gaping them only takes a few seconds for each one. The tool is cheap.
There are some more expensive plugs that are pre gaped.
As the spark plug gap has an impacts performance, just do it.
If they are two narrow you spread them (that is why I use a tapered gage), and if they are to wide I gently tap them on the inside of the fender well to close them.|||Buy the exact spark plug manufacturer and part number specified for your engine. Before you accept the plugs, make sure they%26#039;re gapped to the correct specified gap. You don%26#039;t want to have to attempt to regap spark plugs. You may damage them even if the damage isn%26#039;t obvious, especially for the new high technology spark plugs. Don%26#039;t buy any spark plugs that aren%26#039;t already gapped properly!|||no !spark plugs must be gaped to suite the engine their going in for best performance. they may work with out setting gap but starting and fuel economy will be sacrificed.gap them as per the auto Manuel,if no Manuel use a match book cover it,s pretty close to what the Manuel will tell you ,works in a pinch if you don%26#039;t have feller gauge to set proper gap.|||most plugs come pregapped
if youre gap is off the high voltage will not arc across the space and there will be no spark
if there is no spark you will be wasting A LOT of fuel because none of it will burn it will just go in the cylinder and go out you will clog up your exhaust because of all the liquid fuel you will have horrible performance because no combustion horrible gas mileage and maybe even a fire from the fuel touching your hot exhaust system and igniting|||Most come pre-set but you should check them with feeler gauges before fitting them in case they have been set wrong or in case your car needs them set different to the default gap.|||Today they ll come pregapped. You can check them but I have found that they are good to go out of the box.
It is a good idea to check them as they could have been damage in transport.|||you need a feeler gauge, it a bit of kit that has several fingers made of metal that are different thicknesses..and when you set the gap they will slide into the gap you have set...you can buy gap setting tools...|||they need gapped and you can get a plug gapper for little to nothing at the parts store and they will even show you how to use it.
