Onyx610
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Everything posted by Onyx610
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I’m surprised that it had the adapter, good to know
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Problem with this is that it could be a number of things egr valve, turbo actuator, sensors, etc. You can go ahead check the basics like boost leaks and fuel pressure…but without PTT on these engines your pretty much at a loss.
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Hey for one time use (hopefully) I don’t blame you. Plus you can get it today!
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You can’t do a leak down or compression test without that adapter anyway.
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I found a spot where they are in stock if you wanted to get one. I’m not sure how far you want to get into this. You said you already bought an in frame kit…
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These guys are great and you usually have it the next day. Here’s a link to some of there tools for the mp8. https://www.freedomracing.com/catalogsearch/result/?q=mp8
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https://www.freedomracing.com/9998248-adapter-tool.html
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Where does it connect to Dan? I’d like for you to single down a cylinder.
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Joey leak down tester not combustion gas detector
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Pry a weird feeling when exhaust is coming out of the air filter. Weren’t Detroit’s notorious for this?
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I strongly believe we can figure this out, do you have the tools to do those tests? They cost a good bit of money….I hope some of the “big dogs” as I like to call them that i mentioned earlier will chime In soon.
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What makes you think it’s boost pressure and not fuel? Are you having any power steering issues?
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Yes they are @Vmac3 @Mackpro
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I really wish @fjh would get on here to help you out more then I can.
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This might help you understand what’s going on better then what I can explain.
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No, because you have combustion gas in the coolant system. Id Iike to see the cup re installed and a legit compression/leak down test done. I think you have a few things going on but we need to start figuring out one thing to get to the next. One thing might tell us the rest of the story.
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Are you able to do a compression test or leak down test? Not using tech tool? That sooted up nozzle Is pry from it not firing correctly hence being your “injector 1 error code” or compression loss. If you still can take a magnet to the oil to verify if it’s metal.
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Yea cleaning them doesn’t do much of anything, the cut out test on the cylinder is a good idea. Did the cup in the cylinder show any soot/pitting on the outside?
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You can’t clean the filter on these. These are a centrifugal style filter and I believe you have to buy the whole housing. How many miles are on this truck? It could be very loaded up and blowing out past the o rings.
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Ok so time to go back to the offending cylinder…now for the blow by, those crankcase vent spinners are very expensive so I’m not gonna tell you to just throw one at it. There have been issues with them though. May want to check for pinched hoses.
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Hahaha yea I get it man, I completely feel for you. It’s a shame these are such a pain to tear down. There isn’t really any pin point tests that I know of. It’s pretty much just a known issue and the symptoms that come with either combustion gas in the fuel side or coolant side. Even then the main test is the clear hose either in the fuel return or clear hose from head to surge tank to check for bubbles. Also another one is what your getting ready to do, combustion gas detector. Only problem is that it could be other things if combustion gas is found. Like egr cooler, head gasket, or cracked head. Which I highly doubt.
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Yup, like I said earlier the combustion gas can go into the fuel or coolant. Just depends on if it goes on the inside or outside of the cup. Hopefully this doesn’t turn into anything more then a cup for you.
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Good luck 🤞🏻
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I also don’t see one bad cup causing it to run as bad as you describe, especially if the bubbles clear up over 1k rpm. The weirdest thing is the amount of blowby your describing. Only other thing I could think of for crankcase pressure would be turbo or air compressor. Air compressor could also cause bubbles in coolant but I don’t see any drivability issues with it.
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Aeration of coolant or fuel is a symptom of cups. It just depends on if the combustion gas goes up through the cup and around the injector or it goes up around the outside of the cup.
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