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Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.
While running is there a misfire noticed?
Is the max 4k issue in park or drive?
Can you tell me how it performs when driven with the alternator plugged in and when unplugged?
Yes there is a rev limiter in park and neutral.
Yes this does look like your alternator is to blame for at least some of the issues.
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Hello again Chris here,