My car shifts erratically

Tiny
JOE SOK
  • MEMBER
  • 2003 HYUNDAI XG350
  • 69,000 MILES
My car shifts erratically. Between gears it begins to jerk and be ready to stall. I let up on the gas and the shift occurs. Car accelerates slowly until time for next shift is approaching, then jerking begins again. When car is stopped, when brake is released car lunges forward as if you had been rear ended. At idle RPM's are about 550.
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Thursday, December 20th, 2012 AT 1:43 AM

1 Reply

Tiny
ASEMASTER6371
  • EXPERT
I would start at looking at the cat converter back pressure. It sounds like the engine cannot breathe

Roy
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Thursday, December 20th, 2012 AT 2:14 AM

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