I have a 94 toyota corolla, I was driving to work yesterday and just out of nowhere the car started spuddering, I dont know if that's the right word to use but the only one that comes to mind. I was keeping a constant 60 and then it started stopping kinda like if I was tapping on the brakes. I get really paranoid so I thought the car was dying and took my foot off the gas. I let it slow down a bit then hit the gas again to see if it was going to continue. It drove fine till I got to work. I was talking to someone about it and they told me I need to change my spark plugs because of a piston. It sounded confusing but he said the same happened to him that's how he knew. Sorry if I couldn't explain better, im not good with cars. The check engine light didnt come on, had half a tank of gas. Today drove just fine just being precautious now and need to know if I need to change them right away