Question about 1986 Dodge Ram 50

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Diesel Fuel leak of of large nut in backside of injector pump

Dodge ram 50 diesel 1986. Diesel fuel leaking out of back of injector pump. Exact location: around the large nut that sits in the center of the four injector pipes that exit the injector pump and lead to the injectors. The nut has a smaller nut sitting inside it. How can I fix this leak? What is the function of this center nut (larger & inset smaller one).

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  • geoffbhill Jun 02, 2009

    Diesel Fuel leak out of large nut (Not of of, oops)



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Do yourself a favor and take the truck to a fuel diesel injection shop the larger nut is just a cover but the smaller one is an adjustment if you remove either on you could damage the pump

Posted on Jun 02, 2009

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I need a fuel injector pump for an 03 dodge ram 2500 cummings diesel. i dont know how to find the part number so i can search for the part


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Astra randomly cuts out at lights and engine May be sluggish,randomly code is P0093,FUEL RAIL SENSOR?


This diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model.
When the computer sets this code it senses a large fuel leak in the high pressure section of the engine. The ECM in a diesel always monitors and controls the fuel pressure from the fuel injector pump to the injectors as long as the engine is running.
To set a code P0093 the ECM must sense a sudden large drop in fuel pressure within the system. This drop in fuel pressure can be internal, external or caused by a faulty sensor signal to the ECM.
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The engine may run again but investigate the problem first. This problem will not correct itself or go away. The engine could shut down at any time or speed.
Unlike gasoline engines with fuel injection pressures of 30 to 50 PSI, diesel engine fuel pressure runs up in the Megapascal range, from 4,500 to 30,000 PSI. It takes very high fuel pressure to force fuel into the high compression cylinder of a diesel.
As you progress in diagnosing the problem be always mindful of the fuel pressure when the engine is running. It is ridiculously high! You have a code P0093 stating there is a large fuel leak in the system. Use caution when sticking your nose under the hood of a running engine with this code, or wrenching on the fuel system.
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Look for the code and associated repair procedures and probable causes. Chevy and Dodge reads like a book. The TSBs will include recalls on various items as well.
Look at your warranty. Most diesel engines have long warranty periods for various items. Many cover injectors for 7 years or better and 200,000 miles.
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