Originally Posted by FordDoctor
You are correct that excessive blow-by is a base engine symptom - cylinder related specifically. If you repair the engine you need to identify and correct the root cause of the engine wear or damage. Most commonly with the early model year 7.3L Power Stroke engines the air filter housings and inlet ducting were prone to poor sealing and leaks.
ya i have been trying to figure out what caused it because my truck only has 260,000 it shouldnt be having blowby in my opinion so i think the previous owner ran the **** out of my truck
but anyway could it be caused by bad injectors? i know that they arent in the best condition but they arent completely gone yet i was gonna replace those while i was digging in the engine