First problem is "sometmes" I turn on the ignition and check engine light is on. I can actually go up hill without touching the gas pedal, then out of nowhere the check engine light goes off and car resumes normally. Second problem is I highway driving at 50mph and the car begins to jerk and buck then wants to stall and sometimes does stop running. After I restart car may resume normally, sometimes though check engine light comes on and car seems to be racing in the engine. No smells as I recall during this problem. PLEASE HELP!
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