Posted by DLMKA on October 21, 2014 at 11:44:26 from (192.189.128.14):
In Reply to: diesel fuel injectors posted by don656 on October 20, 2014 at 18:29:28:
The quickest and most reliable way to contaminate a diesel fuel system is to open it up. Never remove lines, pumps, injectors, etc unless all your troubleshooting indicates a failed component.
Hard starting and smoke at start-up indicates to me low compression or incorrect injection timing. It's highly unlikely that all 4, 6, 8 injectors all fail at the same time. Usually they go one at a time unless you have a catastrophic upstream failure that loaded the whole system with debris. Classic symptoms of failed mechanical injectors are either hot or cold cylinders from over or underfueling (respectively) combined with smoke that won't go away as it warms up indicating more fuel than can be burned or poor injector spray pattern.
Newer injection systems are electronic and you'll usually get an engine code on your ECM as part of the on board diagnostics.
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