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Towing Slowly Up Hills
'08 6.4 slows to 45 climbing up 6% slopes. I think it's computer related as it will just sit at 2600 RPM with 25 lbs of boost. After a while it shifts down producing 3000 RPM but the boost goes down to 20 PSI so it still won't accelerate. On less incline it produces up to 32 PSI.
Ideas?
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Jim
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