higherlife
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- Oct 16, 2014
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Mine only "hisses" till warm so I'd say something is off. The only other time it'll do it is after driving, the vanes open and close a couple times only lasting a few seconds. The old stocker did that. Have you tried maybe returning to stock and reloading the tunes? Could it be exhaust brake related possibly, wasn't there a bug in the tuning that kept the exhaust brake from working? I'm just guessing as I have a retro fitted 12 but I'm sure it'll get worked out.
Keith
Exhaust brake still does not work. It blinks then shuts off. I will try to reload the tunes, i am starting to have get worried.....i might have spoke to soon