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in such an extreme circumstance as you describe, I suspect build up would become a problem. But, except for those living in a city, I suspect just driving it would keep build up down.
On the Nissan Sentra I had there would be visible buildup on the throttle plate which would wash off with carb cleaner. I imagine there is some buildup like that by the fuel injectors, but due to the higher temps that close to the combustion chamber it isn't nearly the issue it was with the carb. While I don't think it's as big a deal with a modern engine to "burn out the carbon" on a regular basis as it was with an older carbed vehicle, I would consider a good hard run 2-3 times a year a good idea. Take that thing to the hills and give it the beans. That should clean it out!
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 RIP Maxima 1997-2012
Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
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