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6.0 Hydrolocked need help please.
Hey guys, long time lurker here. I am having some issues with my 2005 6.0 and am a little stumped at the moment. Any help would be greatly appreciated.
I had a bad injector, injector was changed and all was well. About 2 weeks later I started to get a little intermittent miss that would go away if you rolled into the throttle. The miss only appeared under very light load situations. If you allowed it to progress it would get bad enough to barely run, but as long as you rolled into the throttle right away it would go totally away. I assumed another injector was on the way out, so no big deal, the truck has 250K miles on it. 3 of which are still original injectors.
Fast forward another week or so. I changed the oil to Delo 400, new motorcraft filter, and new motorcraft fuel filters. On that same day I did short coolant flush.
Shortly after this I began getting what I thought was a bad spot in the starter upon cold start cranking. It would crank fine once warm. As I now realize it wasn't a bad starter, it was partially hydrolocking. The hydrolocking has gotten worse and worse. I did the BB mod on the fuel spring and it seemed to get even worse. So today I pulled the glow plugs to try and find where the hydrolocking is taking place. Nothing came out of the cylinders.... literally when cranking it over no fluid came out. There is a milky mixture on the charge pipe going into the intake manifold that appears to be oil and coolant. There is also fuel or oil in the degas bottle.
Now here is where it gets interesting. I am studded, black onyx, and egr deleted. It was an MKM customs kit with the sinister egr delete. The truck makes great power and runs fine once started other than the minor stiction. Gets great fuel mileage (20+) highway. I currently have the Hybrid Race tune from the free Spartan tunes loaded.
Does anyone have any idea how I can be hydro locking with the EGR deleted and studded? Obviously it could be head gaskets, but it just seems odd for the coolant to end up in the cylinder instead of it all being pushed out of the cooling system. I am losing coolant from the degas bottle, and it is under a lot of pressure when I remove the cap.
I did a contribution test and all is fine other than when I drive very light load to get it to cause the problem with the injectors on purpose. When doing that I get about -50 on number 1 at idle and -25 on number 2. The only other irregularity I saw was when cranking 7 would occasionally show some small negative. I ran a Buzz test and it would only buzz 3 times? No idea about that one.
It is all very strange, it could be a combination of problems I guess. Did the flush clog the oil cooler and lead to the coolant issues? Is an injector sticking open and causing the hydro locking? It only hydrolocks when it sits off.
Thanks for any help anyone can offer guys, I would really appreciate it.