| Diesel won't start? | ||
| As always, read your manual
first. If you're here trying to brush up on the most likely reasons that you may
experience a "No start" situation, you've come to the right spot. We have listed
the most common causes for a no start on a diesel engine, in order of most probable
occurrence. This isn't to say that you may not have the most improbable source of a
failure, but often the basics are the best place to start. First, we'll list the things to
look for and then we'll explain the ones that need explanation. We are also assuming that the motor cranks over properly. Warning: Diesel fuel is at extremely high pressure and extreme care should be taken when dealing with the injectors, injector pump, and associated components. A fuel injector will shoot diesel fuel into your body through your skin, given the right conditions. Read all warnings and safety precautions in your manual before attempting any test procedures on a diesel engine. Wear safety goggles when dealing with high pressure diesel fuel.
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| Note: In extremely cold weather,
diesel fuel can turn to jell and of course you are not going to be able to pump jelled
diesel fuel. Also note that diesel fuel will grow a fungus that will clog filters and
lines and care needs to be taken to prevent this fungus before it starts to grow in your
fuel system. There are numerous additives for diesel fuel that prevent and or reduce these
problems. (Ask any trucker) Fuel Kill Circuit Since the only practical way to stop a diesel engine is to "cut off"
the fuel supply, almost every diesel ever manufactured uses a fuel pressure relief valve
in the high pressure side of the fuel injection system.
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| As you can tell from the list above, fuel
and related issues concerning the fuel are the number one items that can cause a no start.
Air in the fuel line can come from several sources.
The easiest way to check for air in your system is to carefully loosen an
injector line at the injector or the injector pump output and crank the engine,
observing the fuel flow. Bubbles and or no fuel drip while cranking is not a good sign.
========== Work In Progress ============
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