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south texas | Can anyone post a link to a good source for stc explanation or post here? I am wondering how the system works. From what I can gather the oil pressure from the engine is regulated in the stc valve and sends a portion of the pressure to the inj to adjust timing of the fuel to the cylinder. Does the inj work like a normal inj with out oil prssure or need full pressure to inject corectly at full load? My cummins books have about as much info as a trucks owners manual on stc. Wondering if my lowpower issue could be from injectors placing fuel to late in the compression cycle. Maybe the plastic tube was cracked during installation and allowing pressure to escape the timing control. Does the oil enter the inj from the oil line on top of the head, what should this pressure be related to eng oil pressure? We get about 40 psi at op temp on engine, could place a gauge on stc line and see if it is low. Thanks for all you patience and help. I really like to know my engines since we tend to keep them a long time. If I cant figure this out will be first diesel mech on farm since 2009. | |
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cummins stc system (step timing control)
