Any help would be appreciated. Bought this truck from a farmer friend who owned it for the last 16 yrs. It is a 1995 K2500 4x4 with the 5.7 and 4l80 trans. the truck was ordered with 4.10 gears. now on to the problem..... this truck had a bad miss, no power and poor fuel mileage(8.9 mpg). I took it to two different shops they ran diagnostics and couldnt find the problem at either place, no engine light or stored codes at this time. I have replaced the following- plugs wires cap and rotor, air filter, fuel filter, fuel pump, pick up coil in the distributor, also checked the gear on the distributor. this got rid of my misfire problem and seemed to help the engine start easier and run smoother. I then removed the cat. converter and installed a thrush welded muffler with new pipe to the factory exit. o2 sensor tested ok. still no power and bad mpg so I replaced the ecm, still no improvement. I have tried swapping out the egr valve as well as the injectors, I tested the iac valve on the throttle body and cleaned it as well. coolant temp sensor is reading ok under diagnostics at the shop. so I am at a loss on this one. The truck just has no low end power at all and is still getting 9.5 mpg after all the work i have done thus far. I have owned this style truck in the past and theyt always ran well and got decent fuel mileage but this thing is a slug and eating me alive in fuel. any ideas?????? ---------- Post added at 01:30 PM ---------- Previous post was at 01:27 PM ---------- Almost forgot I did find a caliper hanging up up front recently and thought I had found my power and mileage issue but I replaced the calipers, rotors, and pads a couple of weeks ago and although it no longer feels like I am towing a trailer it still has no low end and gets 9.5 mpg!!