Remember that the Detroit / GM 2 stroke diesels such as the 6V53 are fitted
with unit fuel injectors. The fuel pump on these engines is their purely as
a delivery pump. Final injection pressure is created mechanically by the
fuel injector itself. The diagnosis that Andreas describes is pertinent for
a hydraulic type fuel injection system which creates the high pressure for
injection at a separate multiple piston pump such as those built by Bosch
and which are fitted to many different makes of diesel engine.
The point I wish to make here is that diagnosis of the problem in Doug's
6V53 needs to be specific to that engine. I have emailled Doug privately
with some suggestions.
Cheers
Rod Diery (former Australian Army marine engineer and a lover of Detroit 2
stroke diesels)
Kulin, Western Australia
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