Vehicle has been great up to now. It has 75,000 miles. I have driven a mix of city and highway with minimal problems. A few weeks ago the car begain sputtering upon starting. Typically it would go away in a few minutes. This past Monday it got worse. When I pushed the accelerator it was as though it was not connected. Mechanic replaced the ignition coil but this did not solve the problem. They do not know what the problem is.