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About jw63

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  1. I've experienced a similar situation...was hauling a trailer and accelerating after a roundabout. Truck didn't down shift (good reason to always have tow/haul mode on when towing lol) and ended up lugging the engine and experienced some serious engine knock...as soon as I let off the throttle the check engine light quit flashing and went away. Doubt you'd be getting the same issue by simply climbing a hill, but a possibility I suppose. I've had a cylinder misfire in another vehicle in which case the computer would probably put the engine in limp mode/deactivate that cylinder, and store the check engine light code (light would stay on until the code gets erased).
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