I suspect this has something to do with the plugs beign driven in opposite polarities from one coil. Probably one plug handles it better than the other. Any opinion on that? And what about air filters? Is one brand any better than another as far as you know? Specifically Mann vs Hengst? I just bought a Mann from Fastlane.

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra