My car had an ignition misfire code, and it has new Bosch Plug Wires and new Bosch Spark Plugs: Platinum 2. Also, the thermostat has erratic movement, for example i would brake completely still and the thermostat shoots about 3/4 to H then when i accel, moves back down to normal. Also, after the misfire code, cranking it has been a pain, I have to constantly stomp on the gas pedal for it to crank and rev the engine...does anyone know a solution to these problems? thanks.

 

three things an engine needs: Fuel, Spark, Compression
try a compression test next