I am thinking its the injectors on my car or bad gas. It can't be bad gas all the time right. Theres no leaks anywhere. I replaced all the sensors and add some horse power. If I was to guess I would say 280 hp. The thing is I dont get to use all the power. When I hit the gas sometimes it feels like its choking. After I drive for about 5 miles the check engine light may come on untill I turn the car off. When I start it up again its off. Please help me. I had this car for 12 years and just rolled 100,000 miles.