Motor issue - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 07-10-2013, 07:36 PM Thread Starter Rookie
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Motor issue

I am looking at a truck that the guy said the injector went bad and now it has lost compression in that cylinder any idea of a rough idea what it will take to fix it
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post #2 of 2 Old 07-12-2013, 05:44 AM
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I'm new to these PS too, but not to buying broken cars. In my experience, you would be best served by assuming the loss of compression is due to a worst case scenario and will require a complete teardown. In my rudimentary understanding of the powerstroke system, I do not see a simple scenario in which an injector failure can result in a loss of compression that is easily rectified. If the injector was stuck open, wouldn't the cylinder be flooded with diesel and compression pushing back into diesel fuel rail causing all sorts of other problems? If the injector o-rings were bad wouldn't loss of compression also cause compression bubbles in diesel and maybe even HP oil? It's not like a loose injector would cause a loss of compression to atmosphere without diesel and HP oil problems. I would suggest that the loss of compression in that cylinder could be a result of damage to the piston, rings or somehow valves. If you assume an engine rebuild will be necessary, then you won't get burned in the transaction, but may come out ahead.
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