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Old 25-10-2020, 03:19   #31
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Re: How could it happen? Algae growth in hose after filters and before Injection Pump

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Update to my problem. All lines from filter to injection pump now clean. New secondary filter. Fuel arriving at injectors but no firing. My guess is that water in the fuel caused bacterial growth in the lines after the filter. Apparently filters do not stop dissolved water.

I am now running diesel injector cleaner through the lift pump, secondary filter and then through the injector pump to injectors using the starter motor in bursts of 5 seconds. Impeller removed. Still no start but fluid is running back from injectors. Have let it sit for 24 hours and will try again.

Current theory is that injectors are stuck. Will probably have to remove and clean injectors or get new ones.
what 1 in line filter water separator you use
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Old 25-10-2020, 04:10   #32
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Re: How could it happen? Algae growth in hose after filters and before Injection Pump

This video is about cleaning injectors for gas engines. Would the same procedure be used to clean diesel injectors?



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Old 25-10-2020, 05:33   #33
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Re: How could it happen? Algae growth in hose after filters and before Injection Pump

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This video is about cleaning injectors for gas engines. Would the same procedure be used to clean diesel injectors?



jon
no diesel injector is different, I newer clean diesel injector.
in garbage and exchange element in the injector.

search (your engine name) diesel injector parts

ussualy price 200-500€ (and more MTU x10 military x100) per injector now customer decide repair or bay new
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Old 25-10-2020, 16:57   #34
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Re: How could it happen? Algae growth in hose after filters and before Injection Pump

Any thots on this one?

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Old 26-10-2020, 06:49   #35
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Re: How could it happen? Algae growth in hose after filters and before Injection Pump

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Good explanation -- but misses one point. Injectors work by blocking fuel flow until the correct pressure forces a spring to open. A little pulse of fuel then pops through the tip and into the cylinder. If the spring gets weak, the injector will release fuel too soon, and it won't spray into the cylinder correctly. To test this, you need a fuel injector tester, which lets you slowly increase fuel pressure until the injector pops. The device shows you the pressure at which the injector popped. If the pressure is out of spec, you can adjust the spring with wee little spacers. The video doesn't talk about that stuff at all -- but it does show you things you can do yourself to clean out crud. That may be all you need to get your engine firing cleanly.
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