Have you run some regular diesel through the system with a strong cleaner? I don't know what you have available that is reputable as far as cleaners are concerned, but give it a go before tearing into the motor to rule it out. I am hoping it's something simple.
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Volvo WIA42 VED-12 / 335 hp / 1300 ft/lbs / 9 mpg
Big n' Boxy, Never met a Hill it Didn't Like
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