The cap and rotor would not be the problem as they are installed in preset position. Therefore the problem lies in one of two other possibilites: (1) SPARK PLUGS: Did you check the gap on the spark plugs? New spark plugs do not always come pre-gapped and it is always a good idea to check them. Spark plugs that are not gapped correctly will "miss" or "skip" and not give good performance. (2) WIRING: When you changed the plug wires, did you ensure you bought the right wires for your application? If the wires are not the right ones, you will get a "miss" or a "skip". Another problem would be the routing of the wires from the plug to the distributor. Did you remove all wires at once and maybe crossed up the order that they fit back on the distributor? Are the wires fit snuggly on the spark plug and the distributor cap?
Denso IK20
Read your owner's manual. Today's vehicles use platinum tipped plugs. They are good for at least 100,000 miles unless they fail which would cause severe missing and a severe drop in fuel mileage. If you have regular service done, have the mechanic check them.
NGK platinum plugs
You might have to much oil in the engine. Check oil. Clean spark plugs. (remove and use sand paper to clean)
Changing the plugs and plug wires correctly has nothing to do with nor can it cause an oil leak.
Obviously- the spark plugs were not the issue :)
yes
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No. There is nothing involved in changing plugs that requires or draws electrical current.
I believe the dealership gets 190.00 time and plugs
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.
OEM sparkplugs are horrible you will be replacing them again in 3 months or so go to schucks or pep boys and get some good spark plugs from them Alexander G Medvedev Owner of Toyota Celica GT 2000 371Hp CEO m8Auto Import Club Anchorage Alaska