When engine is warm and I stop the car it goes to 900 RPM 10 sec, then to 750 5 sec, then to 500 2 sec, and then to 750 5 sec and finally goes to 300 and engine stops. I live in ND and it is -10F outside and fan is on. I honestly doubt that this cleaner can remove carbon buildup on the intake valve, with the small amount that is pulled over them - he did use the entire can though - but I do think it's possible that doing this could, if done fairly regularly, could limit the amount of carbon buildup that occurs.I already saw your post in some other thread and I did try it and it didn't help.Īlso I noticed that cooling fan is always on. This is why the other video is showing the cleaner put directly onto the valves, and allowing it to sit - so it can actually sit and clean them. I doubt this process can clean the carbon deposits, while the vacuum will pull the cleaner to the valves, it will also pull it off them, and into the cylinder. So, by inserting the cleaner, into a vacuum line, you are able to get the cleaner onto the carbon deposits, but is it able to clean them? I have no idea. This air passes over the intake values, where the carbon build up is present. Air is pulled into the engine through vacuum lines. The engine is basically a large air pump. The injectors deposit fuel directly into the cylinders, the video was clearly showing the cleaner being added to a vacuum line. Some people in previous posts are talking about the injectors, the process in the video has NOTHING at all to do with the injectors. The premise of the original video, in theory, is correct, but I have no idea if the cleaner used is capable of actually breaking up the carbon deposits. Sure, PI will work great, but that's a solution that's not practical for the average (stock) N54. This will help EVERY N54 on the road today. If you want to extend intervals between walnut blasting, look into beefing up the PCV system. Other DI-only engines don't require walnut blasting at the same frequency as the N54. For clarity: NOT that we have to walnut blast, but how often. I referenced the poor factory PCV system because it IS a major contributor the the rate of which these engines have to be walnut blasted. It's the design of the engine, and the injector placement, that is the major contributor - and that will not change based on the functionality of the injectors themselves. The injectors, themselves, aren't the cause. Keep them as clean as you can, even replace them, it will not impact the rate at which you have to walnut blast. His post was hopeful that cleaning his injectors would help his need to walnut blast. My reply to the OP wasn't intended to be a thesis on the flaws of a DI-only design, and how that contributes to carbon build-up. I think you're missing the context of my reply (and the OP's post). A lot of engines have poor pcv systems, vr6 engines come to mind and they have pi and don't get gunked valves. Sure, it's not great on the n54, but if that problem didn't exist we'd still have to clean the valves due to others inherent issues with DI engines.
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