12.36 MPG Help
So I have read some threads and here is where I am. 1994 4.0 177000 miles, K&N, New thermostat, electric fan, new water pump. Seems to have a decent tune up. Runs well. 33's with 4.10's I installed a 35 tooth speedo gear.. I checked with both a gps and calculated RPM in gear and it is dead on. Based on the dash gauge I cant get the engine temp above 150 or 160 when driving. So am I in open loop mode getting crappy mileage. I anticipate a complete tune up to include cleaning the throttle body and replacing the O2 sensor. It does not show any codes, I hate throwing money at a problem. Any advise or suggestions would be appreciated.
I have done so much with so little for so long, I can do anything with nothing forever.