ok well heres the problem. i habe a 94 ram 1500 4x4 with 33" tires and it dose pretty good around town except for take off and acceleration. but on the high way when i hit 70 thats just about it. it will runn at about 2000-2200 rpm's at 70mph but if you push the gas the rpms wont change at all nor will the speed. i tried pushing it farther to the floor and it finally just jumped to 3300 rpms with no acceleration the engin just reved higher. i held it there for a few seconds and still no gain in speed. then i presses the gas a little more and the truck suddenly jumped to 4500-4700 rpms and i wore the steerinf wheel . it felt as if i had just slammed the breaks. i have no idea what this could be. it drives just fine around town and up to 70mph, with no problems. any one with information please let me know.

 

Sounds like it could be a clogged cat. wWen they get clogged up they really restrict the flow, so at higher RPM they bogg everything down.

 

If it's your cat, temporaily when mine completelyclogged (about 1 1/2 away from home),I smacked it with a baseball bat to break it apart, turned O/D off to keep the revs high, and went about 80 on the highway at, i think, like 3k rpms and it blew it right out. I replaced it with a magnaflow high-flow.

 

Could be a clogged cat but that's not what caused the RPM increase and rapid deceleration. The transmission was downshifting. What size engine do you have and how long have you had 33's mounted? Has it always done this or did it just start lately? If it's not an actual power problem, it might be the TPS ... or it could just be a mix of horses/gearing/tires/headwind. The TV cable controls downshifts so a messed up TPS should act like this.

Pretty sure a clogged cat wouldn't let you get to 70 mph without a heavy tailwind ...

 

iv gotten to 70 with a clogged cat before. just if you start to hit the gas to go faster it would just rev alittle and go nowhere. sounds like the cats clogged.