I have only had my 2001 insight for three months and like the mileage I'm getting about 48mpg. The question is Where are the spark plugs? I looked under the plastic cover and on the radiator side of the motor it looks like the fuel rail. On the firewall side it has three u shaped things held in by a 8mm bolt and when I removed the bolt and took out the thing it looked more like a injector than a sparkplug. my car is pulseing at 30mph to 45mph when I should be getting my best mileage. Any help would be appreciated.