My Girlfriends 2000 3.8 is having a couple problems... It starts hard almost every time. It is getting about 9MPG... This car has been doing this since we bought it a year and a half ago. After doing some research it lead me to the coil pack. I tested the coil primary terminals and got 1 OHM of resistance, which is within specs according to my haynes manual. I tested the secondary terminals and was not able to get a reading, the tester stayed in OL. I will try with another tester with a higher range on monday. I have done the full tune up. She puts in the mid grade gas. I am out of ideas. A list of things done to the car New tires, which are properly inflated Spark plugs and wires Fuel filter Trans filter and fluid New Battery Air filter Pcv Valve Thermostat and coolant flush There is also a problem with the Heat, It wont work until the car has been driven for 15 mins or so. I was thinking mabey heater core but not sure. Any help would be much appreciated.