Originally Posted by KENNYB91YJ
Does anybody know why I lose ten mph when going up hill on the highway? It can be a very small incline and I still lose that much. Any suggestions on what I can do to fix it. Thanks
Folks are probably going to need more info about your Jeep and the situation for you to get a good answer. Did this just start or is it something it has always done?
Prevailing wisdom from other posts I've read on here related to this problem seems to be that this is either a poorly tuned engine (plugs, wires, etc.), dirty/clogged fuel system, or the result of putting bigger tires on without re-gearing.
My 93 YJ 4.0 does the same thing, and I'm pretty sure it's the tire/gearing issue so I'm just living with it for the time being.
[COLOR="Yellow"]I have read hundreds, if not thousands, of threads on here and it's amazing the percentage of problems that wind up being caused by something the owner has accidentally done to the Jeep while working on it.
Moral to the story: If you moved it, unscrewed it, unbolted it, hammered on it, wiped it off, re-wired or replaced it - Check there first![/COLOR]