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Boost question?

634 views 1 reply 2 participants last post by  richc22a 
#1 ·
When I come onto the hwy with the gas in one spot every time the truck shifts gears the boost falls then comes back up. You can actually feel the truck kinda falls on its face then picks back up. Anyone else seen this I really hate bringing my truck to the dealership.
 
#2 ·
sunds like life before the 400/800 reflash, there was an 'rpm range' that was flat...

Reflash?
 
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