jshrum15
Aug 20, 2011, 09:35 AM
I have a 99 f-350 when I turn the key to the on position to heat glow plugs the #3 relay under the hood clicks and in turnt the service light and fuel pump turn on and off also a sensor on top of motor is making a hissing sound, fuel pump is a year old cam-posi-sensor is new, also the glow plugs aren't getting hot. Have replaced relay and would replace sensor if I knew what sensor it was.