My wait to start light doesn't come on at all when the motor is hot. Is there anything that actually gets a signal from this light like a fuel solenoid? I really feel like it's a fuel delivery problem. The starter turns over really good and fast. If it was the IP, would it have other symptoms? I'm going to try squirting some fuel into the air intake and see if it hits. I was told that ether would damage my glow plugs. Wouldn't that tell me if it is a fuel delivery problem? This is my first diesel by the way.