go read up on the
EGR that is required emissions controll device, thats the source of carbon.. mine was replaced under warranty so they just put a new manifold on since the variable vanes stoped being operational.. there's a service bulletin for it because its so common.
Generic Article:
https://brentuning.com/?news=the-importance-of-carbon-cleaning-your-direct-inject-engine
delete the EGR and/or reprogram it so its never used and the problem goes away with DI engines.. in our case it was likely exasperated by the fact the vehicle was just used for short trips to the store, since EGR is basically 100% duty to warm up the engine it clogged er up fast.
now I seafoam spray it through the intake from time to time after giving it a good beating and hope for the best.
back to the OP, I tried this on my last setup and it didnt work out all that great.. was never willing to idle it long enough to get SLA battery back up to 100%, was abusing batteries and they simply never lasted long.. so this time around I got a small generator that I can run as much as needed, even if we are away from camp fishing/hiking/wheeling.
Thanks for the link.
I just did some more research because I was unfamiliar with the problem. Interesting problem. I always tell my kids, there is no end of opportunity to be a problem solver...for every new idea, we create at least one new significant new problem to be dealt with!
Anyway, my brief research leads me to believe that most of the people who are talking about this issue seem to think it's a result of crankcase blow-by from the PCV system; while others attribute the problem strictly to contamination from EGR gases.
On a properly operating engine, the EGR system would be mostly burned and semi-burned hydrocarbon gases resulting directly from the combustion process. It would seem that those hot gases would contain mostly light, fluffy and dry (not oily) partial-combustion HC particulate matter mixed in wirh them.
On the other hand, on that same properly operating engine, any PCV-related gases would be mostly oil droplets and oily gases since they are coming directly from the hot oil in a closed crankcase environment. Further, most of the soot from any blow-by (during the combustion process) that escaped into the crankcase system would likely be captured in the hot oil film that covers every square inch of the crankcase side of the motor and would remain there as entrained soot in the engine oil (until oil is changed).
To me, it would seem that these hot, sticky oil vapors coming from the PCV system are being carried downstream in the intake manifold and instantly carbonizing as they strike the backside of the hot intake valves..
And so, IMHO, it would seem that the PCV related hydrocarbons would be a much bigger problem (especially if the engine has excessive blow-by) than particulate matter coming from the EGR.
I would like to hear some more thoughts on the subject...
Regards,
RestorationRides
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