97 Chev Lumina, 106K miles, 6 cyl auto. At highway speeds my car occasionally misses, sometimes so bad it shudders and the speedometer jumps up and down. One mechanic guessed oil pan gasket and manifold gasket ($1600), another suggests it may be a bad coil pack. Have you heard of these symptoms? Thanks for your expertise.
Nov 19, 2007 at 3:14 AM