Typically, a do-it-yourself plug wire kit is boxed with the spark plug terminals and boots already attached to the wires. The wires are already cut to approximate lengths but are left long to ...

Attach the spark plug to a spark plug tester, then connect the tester to the ignition wire. Start the engine and observe the ...

Car Care: Take cars that misfire to a repair shop, where their spark plugs and ignition boots should be checked.

Also available from ACCEL are these 90-degree Extreme 9000 (PN 9001C) ceramic boot wires for tight applications that call for a sharp turn at the spark plug.

Changing your spark plugs is an essential (and relatively easy) part of car maintenance--here's how to do it.