How do I change spark plugs on a 94 j30?

It's a simple job. Just make sure you get the original NGK plugs. All you have to do is remove the two bolts holding down each coil and then pull the coil ...How do I change spark plugs on a 94 j30?You are going the need a spark plug socket(buy at most hardware/auto parts stores, different sizes so ask an employee or see if theres a book), a ratchet, and probably an extender. Wait for the engine to cool down. Once ready take out the wires from the holes. They're gunna need a good tug so don't wuss out. make sure you remember what wire goes to which hole, this is important. Usually the wire will have a number on the top of it to go to the corresponding cylinder. Now get the ratchet and spark plug socket, if you need an extender use that too. Plug the socket over the plug and unscrew it (lefty loosy, righty tighty). Repeat with all the other plugs. Now with all the plugs out, you can start putting the new ones in. Set the plugs in the socket and then into the hole. Make sure ur screwing it in straight. try to make it pretty tight. If your socket gets stuck in the hole when you pull the ratchet off, you can use a set of pliers to pull it out. Now with all the new plugs in, you can put back the wires in their corresponding spots. This again is going to require you to push hard to make sure the rubber part is in all the way. Once you get all those try to start the car. If your engine wobbles a lot or doesn't even start you did something wrong(i would assume you could have guessed that though). If ur engine shakes and rattles that usually means one of the cylinders isnt firing. Most of the time its because the wire isn't in all the way. If that dosnt help check all the plugs. If you still have problems consult a professional.



Hope i helped



Good luck!