(03-16-2017 )Rawze Wrote:  

(03-16-2017 )Tmaj12k Wrote:  Hi guys. I'm in need of some help. Maybe there is somebody out there who has experienced what I'm going through and can offer some insight for me. I have a 2010 Prostar with a Cummins ISX engine. I've been having an issue where if I'm driving with a load, as I increase my speed and get up between 50-60 mph, my yellow engine warning light comes on. As I continue to drive and increase the speed between 65-70, the red light comes on. I have to pull over and shut the truck off. Once restarted, the lights are gone. Then everything happens all over again.

I took the truck to the shop to have it scanned and I had 52 faults for the crankcase pressure sensor. I changed the sensor and the same thing keeps happening. Back in January I had these similar issues and after a scanning was done I changed the filter. This was the first time I've changed the filter since I've had the truck and it's going on 3 years. When I first put the new filter in the truck ran mostly issue free. Besides an occasional yellow light popping on then going back off by itself. I never had to stop the engine due to the red light until a couple of days ago. I checked the filter today and it looks pretty dirty again. The filter has a greyish color. Before it was closer to black.

Does anybody have any clue as to what can be happening? It has to be something related to the crankcase sensor and filter. What could be causing it to trip?? Why is the filter dirty so soon? If anyone can help with any info I'd greatly appreciate it. Btw, the truck has 719k miles.

Thanks

so you severely neglect your engine and expect it to run ok? crank case filter shoulb be replaced every 80k miles max on a new truck, one with wear and blow-by it is more often than that.

(03-16-2017 )Tmaj12k Wrote:  I'm pretty local. So in the 2+ years of having the truck I've put about 100k on it. So it was time to change it back in January. But now the red light is back. I think I'm gonna change the filter again to buy myself some time until I can figure out what's happening

(03-17-2017 )Hammerhead Wrote:  

(03-16-2017 )Tmaj12k Wrote:  I'm pretty local. So in the 2+ years of having the truck I've put about 100k on it. So it was time to change it back in January. But now the red light is back. I think I'm gonna change the filter again to buy myself some time until I can figure out what's happening

This would be called The Stick Your Head In the Sand Procedure # 000-000.
If you are getting excessive crankcase pressure, something is wrong, period.
Excessive crankcase pressure is an indicator of potential catastrophic component failure. A cracked piston could let go and blast a hole through the block &/or head, most likely both rendering your engine scrap metal. A dropped or shifted liner could potentially dump extreme enough quantities of coolant into the oil and very quickly wear reusable components to the point of replacement. Or just for fun, fill the cylinder with coolant during an intake stroke and hydraulically lock on compression, bending a rod, or the crank, cracking the head and possibly the block.
Excessive crankcase pressure comes from 3 sources;
1)Compression blowby-worn rings, cracked piston(s), etc.
2)Turbo face seal-the charge pressure leaks past the seal and into the oil, into the crankcase.
3)Plugged crankcase ventilation-it could be as simple as this. Perhaps the vent tube from the crankcase filter housing to atmosphere is plugged and just needs to be blown free with compressed air...

or you could go with Procedure # 000-000...

(03-17-2017 )Tmaj12k Wrote:  Definitely don't want to stick my head in the sand. After reading your message I'm heading to the shop.