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Changing your spark plugs could theoretically make your car faster but not enough to make a noticeable difference. Changing your spark plugs when they are worn will increase your fuel mileage slightly.
Yes. It could make it better or worse.
it can
Brands such as NGK, and Bosh both make plugs that are said to help gas mileage.
It should make it run better and get better mileage after you replace the plugs with new ones. You may also want to replace the plug wires if the car has over 100,000 miles or is 10 years old.
In short...a bigger bang and cooler air will cause better power and mileage. There are lots of ways to ahieve a bigger bang but not all those ways in combination are good on the engine.the choices of ways to get a bigger bang range from cold air intakes and cool cans to silver spark plugs and capacitor bearing spark plug wires will get you better mileage just make sure you choose the right combination wisely or your bang can turn into a big boom.
AC are the OEM spark plugs and they are excellent plugs. I would recommend you buy AC/Delco Iridium Spark Plugs. They are as good or better than any others you can buy. NGK are also great plugs and I have been told they make the AC plug but I cannot verify that.
At one time,the only spark plugs for vauxhall/opel in general were AC-Delco.Don't know if main dealers still supply them or not? These days,I fit NGK to everything from my lawn mower to small engined light aircraft.There is a saying that NGK make spark plugs,the rest make posh fishing weights!I have yet to have an NGK fail before completing it's full mileage.
Old spark plugs can make a car misfire, run rough, and not fire at all.
The spark plugs?æon a 1999 Dodge Durango are at the side of the engine. Make sure that the engine is cool before accessing the spark plugs.
generally, a tune-up is required,,, replace spark plugs,wires,cap & rotor,,, and use platinum plugs.. It really does make a difference in these engines, as well as the platinums will last ALOT longer and deliver better performance and mileage,, hence pay for themselves in the long run,
You could change the spark plugs, sprak plug wires, computer chip.