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Originally Posted by jeffmorris
Do diesel engines have vapor lock? I used to ride in a Ford 15-passenger van with a diesel engine. Once in a while, if the driver shut off the engine and try to start the engine, it won't start. If it was a gasoline engine, the driver would press down on the throttle pedal before trying to start it. Won't it work on a diesel engine?
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I don't know of diesel engines having vapor lock problems.
On a gasoline engine with a carburator that becoms flooded you press the pedal to the floor and hold it there while you try to start the engine.
If you had to keep pumping the pedal while trying to start the engine means that the accelerator pump (part of the carb) is bad. This should get fixed right away as it's a good way to get a flame going in the carb!
If this happens quit pumping the pedal and hold the ignition on so the starter keeps turning the engine over sucking the flame into the motor and hopefully puts it out. In some cases you can wind up with a carb or engine fire.
A diesel that is cold or has sat and cooled down won't start right away. You have to turn the ignition to the "Run" position and wait for the glow plug light to go out. Then you can turn the ignition to the "Start" position to start it. If you don't wait for the glow plugs the engine will turn over but won't start. I used to drive an '85 Chevy pick-up with the 6.2 diesel in it. I had to wait for the amber glow plug light to go out before it would start. If it had just been running or if it was a hot day then the light wouldn't come on and it would start right up.