I'm going to post some thinking (logic) here. Please correct me if I'm wrong. When the switch is turned on there is always power to the fuse and relay under the hood. The relay is switched on by the relay in the PCM. Right? The ground for the signal from the PCM comes from the AC compressor control (this doesn't make sense?) So, pretty much it is the PCM that has ultimate control of the fuel pump. So, where does the PCM get the signal to turn on the fuel pump? Does the oil pressure switch have anything to do with it as other posts on the internet suggest. And if so, which sensor on the side of the motor is the correct switch? There are 3 of them. One on the back side of the engine (I think it is the crank position sensor) and there are 2 sensors on the front. One appears to be the traditional looking oil pressure switch and one is very small which I kind of assume is a temperature sensor since I don't recall seeing one anywhere else on the engine?
Sunday, July 31st, 2011 AT 12:08 PM