Diesel engine diagnostic tips for diesel injection service : Wear safety glasses when working on a diesel injection system. When in doubt, refer to a service manual for the make of vehicle being serviced. The slightest mistake could upset engine performance or cause engine damage. Never drop a diesel injector or injection pump. They can be damaged. Remember that high pressure inside a diesel injection system can cause serious injury. Most diesel engine problems are related to the injection system. As such diagnosing diesel engine problems requires knowledge of engine and injection system operation. ENGINE MISSING A diesel engine miss results from one or more cylinders not burning fuel properly This is caused by injection system problems which include: Faulty injectors
Clogged fuel filters Incorrect Injection timing Low engine compression injection system leaks Air leaks Faulty injection pump. If diesel engine does not start it may be due to: In-operative glow plugs, Restricted air or fuel flow, Injection pump problem, Low battery power. A slow cranking speed is a common cause for starting problem. Being a compression ignition engine, a diesel engine must rank fast enough to produce sufficient heat for combustion.
Tags:diesel injection service, compression ignition engine, air leaks, diagnostic tips, diesel injector
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September 26th, 2008 at 4:11 pm
I have a 91 dodge diesel in my motorhome, It will not start without using starter fluid, the Pickup pump from the fuel tank never slows down. I suspect that the pickup pump is to weak. shoulden’t the pump slow or even stop when it gets enough fuel to the engine pump?
October 8th, 2009 at 2:45 pm
using starting fluid can be bad idea, especially if used regularly on a diesel. i would check the glow plug starting system and confirm that it works correctly. also check to see that the fuel system does not have any air leaks, as this would cause the fuel pump to run constantly. use a piece of clear fuel line to determine if air is entering the system, and check for leaks back to the tank. good luck!