Check you TPS and the TV cable adjustment. Plenty of threads on both here, just search.

 

+1 on TPS. also, if you haven't done your plenum, that's probably sucking air and robbing power. at lower speeds and rpm's i have to run with OD off and keep the rpm's up over 1800 or so. at 1500 or lower mine is a pig.

 

make that +2 on TPS for your uphill problem. I run 245/75/16's (stock) with 3.55's and I encounter a lot of hills where im at. I experience the same thing you have until I replaced my TPS sensor. I can semi gain speed upa hill now if im upabove 60ish with momentum. If Im below that... just gonna drop and downshift slowly with my pedal down just before the shift point. I have the tranny flash for my pcm. My overdrive doesnt kick in until 50mph now. @49, she kicks down everytime no matter if im ona hill or not. I run atleast 51 no matter what where ever I am, If i see a decent hill, i usually give hera little extra to have that momentum and leave plenty of gap between me and the car in front so I can carry what ever I do have up the hill. If your on someones bumper up a hill. your definately gonna downshift. Take it easy, I would swap the tps first. Pump your tires up to near max (prob do 75lbs if your max is 80). I wouldnt jump 2 the tranny expecially since it was just rebuilt. The "pushing a car" effect you feel, cant really explain that but there is a tremendous amount of drag with my truck expecially going down hills as I rarely ever gain speed. If im in my moms concorde, you can just push the gas pedel once, get 2 speed, and just coast the rest of the way to.... wherever.

Good luck!,
pcfixerpro

 

I checked my plenum the other day, hoping it was bad. but there is no oil pooling in intake. there is oil by the pcv hose though. I might try the TPS, how much do they cost???

 

http://www.google.com/products?hl=en...1&ie=UTF-8
roughly $30-50.

 

I hope his works, i would actually fall in love with my truck again if this is the problem

 

I would love my truck for the first time if i could get 16mpg like Tarner does.

 

mine sucks gas, i get like 10 and have no freakin power. i would be happy with 5 if i had power. Im a Hp junkie always will be

 

hah, don't lose hope man. the best advice i can offer you is to have your truck plugged up to a scanner. you can view all your sensors, the voltage coming in and going out, and check that each one is working properly. you can even drive it down the road and look at them. i wouldn't just hop around changing parts until i knew what was wrong with it. if you can't afford to have it plugged in, get ahold of a good voltmeter. usually a tps has three wires going into it. one will be your 5v input, one is reference, and one is going back to the ecm. check that you have a good 5v in, and when you plug your voltmeter into the output, move the throttle back and forth. if you see your voltage drop out at some point, it means you have a dead spot in the tps, and it needs to be replaced. if you don't find any deadspots, the tps is fine. just replacing parts that don't fix it will get you more pissed off. i say if you can afford to have it plugged in at a shop, go for it. it may cost more but at least you'll get it fixed right instead of swapping parts. it could be something as simple as plug wires... ya know? also take off your distributor cap and look for carbon build up on the terminals and on the rotor... you wouldn't believe how much power that would rob. good luck with your problem, and don't worry, my truck runs like a dream on the highway, and it will outrun most other vehicles, especially above 50 mph.

 

You know, one other thing that hasn't been mentioned in a while is the "Death Flash." That' can rob power from a perfectly good running truck. To all of you complaining about performance: do you have a sticker over the PCM that says soemthing like "factory authorized reprogram"? Search Death Flash here and there's a ton on it. A good handheld chip programmer like the superchips or hypertech can cure it, and a flasher from B&G or SCT is even better.