That is a pretty interesting test, spraying them with brake fluid? I have never heard of that one. Has anyone ever heard of that? Anyway, the only bad cap I ever saw had arcing like you describe and carbon tracks on the inside just like they show in the Chilton manual. But I didn't put any brake fluid on it!

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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