Engine Performance problem
1994 Chevy Caprice V8 Two Wheel Drive Automatic 460000 miles
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when standing on road with ignition on. there is no vibration. but when i give acceleration it moves with jerky movments (wobbles) until 20KM/H speed. then it becomes normal and at 80KM/H it wobbles again and above 100KM/H it becomes smooth again. sometimes the car do not respond even if i give acceleration. my mechanic has made thorough assesment of my car through computer but no problem was found. i have recently changed the seals of fuel injectors. Please advice me... thanks a lot…