Fuel System Enigma Unraveling the Mystery of P0170

First thing to check for is vacuum leaks posted MAF. P0170 indicates a lean condition with unmeasured air. Second would be fuel. What's covered: a simple check for vacuum leaks, a simple remedy, how engines actually work, and fuel injection basics on an Ecotec engine ... Generally this looks like a Fuel Trim Malfunction for Bank 1. It looks like this indicates I'm likely running too lean or too rich, but does not ... P0170 code definition Fuel Trim Malfunction (Bank 1) What the P0170 code means The P0170 code means that the powertrain control module is detecting a fuel ... a code p0170 is a fuel trim malfuction, this could be caused by the fuel running to rich. were both 02's replaced or just one? That is a fuel trim error, not just related to MAF, but vacuum leaks, bad O2 sensor, Oil contamination in MAF connector or O2 sensor connectors. Possible causes for fault code P0101 = ECM130A Air leakage to induction system, Dirty throttle body, Blocked crankcase ventilation or PCV nipple, Faulty MAF. The car seems to rev a lot higher than normal. It shifts around 4000rpms and 1st gear sometimes takes it to 20, 2nd to 40,and rest of gears happen fast. My 97 lude is throwing P0172 that reads "System running rich" and P0170 reads"fuel trim malfuntion". What does those codes mean? How can i fix it? what car is this on? a gas cap or a fuel pump o-ring problem would kick a evap leak if it was an obd2 car, a po170 is a fuel trim problem, which ...