I have an ongoing problem with my 1990 Acura Interga LS(160k). It seems that when the weather is hot and humid my car won't start, later in the evening when the temps cool, it will, and runs fine. I have good spark, the starter works fine. My problem is that when the prior conditions are present the the fuel pump won't be activated. I've checked the main relay, and voltage to the fuel pump. The fuel pump works when there is power to it which is not all the time. I've started to look at the ignition switch but don't a have a manual with an accurate continuity check diagram. Does anyone have any ideas to get my baby back on the road.