Tps voltage slowly dropping
#1
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First off i own a 2001 dodge 1500 5.2, So i keep looking everywhere and cannot seem to find someone with the same issue, my tps voltage seems low even a brand new one, around 3.7 at WOT, however after a month or two after replacment the WOT voltage drops to around 3.2 or so. Why am i not getting more so around 4.5 volts at WOT? Also im getting about 8-9mpg per tank(city/highway) sluggish performance until about 3000 rpm then it feels like i hit the powerband in a 2-stroke dirtbike. Has trouble mintaining speeds up inclines in overdrive on the highway. I hear a "sucking noise" like a vaccuum leak on cold startup, goes away after warms up and disappears upon acceperation while cold. I am thinking of removing forward o2 sensor and driving to see if the cat is clogged and i want to replace spark plugs with better ones. My muffler is currently cut off so i have cats only. Maybe im losing back pressure along with the ****ty stock 3.55 gears(want to change to 4.10s when funds available) can anyone shed some light on my issues or point me in some tood directions.
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