I have a 1999 Mazda 626 4 cylinder
automatic, this just recently started
happening and only happens in the
highway. My car will start jerking like if it
wants to speed up on its own jumps from
2000rpm to 4000 rpm back and forth and it
just feels like I have to floor the gas pedal
to get it to run properly. Any idea what it
could be? Thank you.
Is the check engine light on? If so get the codes read and then post them here. How long has it been since you gave your car a tuneup? Run a good fuel system cleaner like Seafoam or Techron while you are at it.
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