Same problem here. I've add some injector cleaner and it appears to be helping but that is just my seat of the pants estimate. On a recent trip to Missouri mine would drop 10+ mph on sharp inclines. :crying:
O just had this same issue- mine ended up being a clogged catalytic converter. They built one for me and installed it for $330.00- Maybe have it checked? I was lucky to get above 45 mph uphill but now it zooms right along- Now I guess I have to have the 02 sensors done, bnut that's another story-
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