Hi, I'm having trouble getting a str8 answer on what i need to fix. I bought an Actron code scanner and got a 111 with engine off and codes 172 & 176 when i did the test while the engine was running. 1st i was told my fuel pump was going, but either its gone or not in my experience. 2nd was told...

My scanner is giving me codes 172 and 176. Since i bought the truck last year it would only run well on 93 octane, anything less would cause deiseling. I've been told by many anything from fuel pump replacing to a bad coil or wires or bad o2 sensor(s) and last was to clean intake throttlebody...