Hi i just got back from a 5 hour drive to jacksonville and my gas light was on so i got off the highway to get gas and noticed my car was being jumpy, hesitant when accelerating and i thought i was running out of gas. i put in gas and i drove for a minute and the check engine light came on and the hesitation, jumpy ness continued but only shifting from first thru fourth gear and it stops when the rpms get to 2500 in any of the 4 gears and i havent shifted into 5 to see if it does it for that gear. Any suggestions on what it could be,my car has 124,000 miles on it, i had the clutch replaced last year, just had the a/c compressor, timing belt, and drive belt replaced 2 months ago.