A diesel engine that cranks normally but won’t start regardless of the outside temperature either has low compression or a fuel delivery problem. If compression is okay, check the fuel gauge (out of fuel?). Then check the fuel filters and lines for obstructions.
If the injection pump isn’t pushing fuel through the lines to the injectors, it may have a faulty solenoid. Listen for a “click” inside the pump when the ignition switch is turned on. No click means the solenoid and/or pump need to be replaced. If it clicks but there’s no fuel coming through the injector lines (and the filter and lines are not obstructed), the pump is probably bad and needs to be replaced.
More features and functions, please visit our site and welcome to contact our customer-service for any help.http://www.kfzdiagnosegeraet.de/
2012年8月12日星期日
FUEL PROBLEMS
Unlike gasoline, diesel oil is adversely affected by cold temperatures. Diesel is made of heavier hydrocarbons that turn to wax when temperatures drop. The “cloud point” or point at which wax starts to form for ordinary summer-grade No. 2 diesel fuel can range from 10 to 40 degrees. If the fuel tank contains summer grade fuel and temperatures drop, wax crystals can form in the water/fuel separator, causing a blockage.
The cure here is to pull the vehicle into a warm garage so it can thaw out, replace the water/fuel separator as needed, then add an approved “fuel conditioner” additive to the tank (some manufacturers do not approve any additives or prohibit the use of specific ingredients such as alcohol that are found in some additives), or drain the tank and refill it with No. 1 diesel fuel. To prevent the same thing from happening again, you might install an aftermarket fuel heater.
Water in the fuel is another problem that can cause starting and performance problems. Condensation that forms during cold weather is the primary source of contamination. Water that gets into the fuel tank usually settles to the bottom because water and oil don’t mix. The water is sucked into the fuel line and goes to the filter or water/fuel separator (if the vehicle has one). Here it can freeze, causing a blockage that stops the flow of fuel to the engine. So if the filter or separator is iced up, the fuel tank needs to be drained to get rid of the water.
More features and functions, please visit our site and welcome to contact our customer-service for any help.http://www.kfzdiagnosegeraet.de/
The cure here is to pull the vehicle into a warm garage so it can thaw out, replace the water/fuel separator as needed, then add an approved “fuel conditioner” additive to the tank (some manufacturers do not approve any additives or prohibit the use of specific ingredients such as alcohol that are found in some additives), or drain the tank and refill it with No. 1 diesel fuel. To prevent the same thing from happening again, you might install an aftermarket fuel heater.
Water in the fuel is another problem that can cause starting and performance problems. Condensation that forms during cold weather is the primary source of contamination. Water that gets into the fuel tank usually settles to the bottom because water and oil don’t mix. The water is sucked into the fuel line and goes to the filter or water/fuel separator (if the vehicle has one). Here it can freeze, causing a blockage that stops the flow of fuel to the engine. So if the filter or separator is iced up, the fuel tank needs to be drained to get rid of the water.
More features and functions, please visit our site and welcome to contact our customer-service for any help.http://www.kfzdiagnosegeraet.de/
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