I've owned it about 5 yrs, it has 314,000 miles. The check engine light does work, it comes in when you crank it up and goes back off. Have had no major issues with it until now oil changed and tuned regular. Just started skipping every once and a while, and now in a two week span almost constant. When it get above. 30-40 MPH it seems to level out unless going uphill. Below 30 and at idle skips sputtered, and then cuts off unless you press the gas pedal.???????!!!!!!!!

 

how about checking fuel pressure and doing a leak down test.