Read about everybody?s milage and I?m getting a bit below your average. I get 14 mpg, part town part highway (driving economically). The worst is that my engine feels really tired...It won?t rev out in the high gears and feels really low on both effect and torque. Especially in forth and fifth gear, it won?t go faster than 70 mph<img src="/forums/images/graemlins/sleeping.gif" alt="" /> in fourth and less in fifth...won?t rev above 3000 rpm in fourth...Other that that it runs great:) I rebuilt the whole engine last summer and I've only put maybe 3000 miles on it. The truck has 5 spd manual, stock rear axle and sits on BFG A/T 31" (31" tires on 15" rims should equal the same roll diameter as stock tires on 16", right?).
I just changed the O2 sensor and fixed an exhaust leakage near that sensor as well. Feels like the combustion is a little better now with no leakage and new O2 sensor, but still no speed. New plugs, air filter and timing @ 12 dgrs with shorted connectors. Thankful for any thoughts <img src="/forums/images/graemlins/cheers.gif" alt="" />