I am really against wvo use, unless you really know how to purge the system before shut down and start up.....I would also think that running wvo is what is causing your issues....wvo produces a lot of carbon, my engine had so much carbon and gunk in it...that I was always hoping to find diamonds under the tail pipe and under the hood looked like a grease dumpster....I would also think, it wouldn't be wise to go back to wvo at such high altitude...

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