they probably did not space the plugs correctly and that can cause a loss in gas mileage and make the car act up.just replace the two plugs
having bad spark plugs could effect how the spark sparks and when it sparks. new plugs is never a bad idea
why does it eight sparks plugs when its only a four cycl.
Sparks plugs or the distributor's seal is broken. But you should check the sparks plugs first, change them and the sparks plugs wires also. Then if you notice that your plugs are tainted with oil, there may be broken valves on the pistons.
number each wire then pull all the plugs out and your ready
( 6 ) spark plugs
how do you replace the spark plugs on a vw beetle
There are no plugs has coil for each cylinder
Take out one of the spark plugs. Check whether it sparks.
just remove the coil's that are on top of the plug, then change the plugs.
where is the spark plugs located on a 1996 mercedes e320
normally around 100K
Champion RC12ECC