I took my 87 non-turbo to get it smogged, and there were problems. The guy said according to his tach, the car was idling around 1500, but the cars tach said around 750; what's up with that? And he said the yellow mark on the pulley wasn't lined up right (I think I could figure out how to fix that one). And he also said that when he took the readings from each wire the degrees were all haywire or something (I think the leading is supposed to be 5 degrees, and trailing 30 degrees?) How do I fix all this stuff?