Like Sudsy said, start with fuel and air filters, when I've had suspected fuel problems I would hook up a fuel pressure gauge put under a wiper blade and take it for a drive. Did you tell the dealership about this problem? I have a Scangauge installed, it plugs into the Obd and I can % of load on the motor on the fly
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Mike & Becky
2005 Crescendo 8356
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