Symptoms: Car (1988 900s 16v, 197kmiles) starts normally, seems to be running fine. Yesterday, the radio wouldn't come on, asking for the code to be reset, which makes me think there was an electrical interruption somewhere. Today, it started fine, check engine light was flashing in a 4 flash sequence at 1500 rpm, went to a solid light above 1500-1800 rpm, flashed again when I slowed back down. The car is runnning fine. The code seems to indicate a "knock sensor", (whatever that is). Any other ideas or guidance? James F. Hodgdon Jr. Hodgdon Scale Models
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