Pontiac Repair: pontiac g6 2006, pontiac g6, crank sensor

Question
how repair a g6 2006 2.4l ecotec p0300,  i change the crank sensor but the car still have the same probleme idles good but no power.

Answer
Hi Michel:

A p0300 can be caused by a lot of different things it's a random misfire code. when it's running you said it idels good how about off idle does it feel like it's not running on all 4 cylinders or does it just bog down? These cars has issues with catalitic converts plugging up and the back pressure in the exhuast would cause misfires and a lack of power. That could be the issue here or possably it's lacking fuel pressure/volume. there is enough to run the engine at low speeds but not hi speeds.. Good Luck :)