The car constantly vibrates, doesn't get enough gas, and even at idle, the tachometer constantly moves. I've taken it to several mechanics in Karaman, but they've replaced the ignition coil and spark plugs, but the problem persists. The car is a 2002 model with a cylinder engine, so they disabled it, thinking it would work with a cylinder engine. The problem has persisted for about three years. I'm looking for help from anyone who has experienced this problem and resolved it. Please don't post just to give me advice.