Stuw
Member
- Joined
- May 19, 2018
- Messages
- 20
- Reaction score
- 4
- Year, Model & Trim Level
- 2004 Explorer XLT 4.6L V8
Just wondering what all the PCM uses to calculate the short term fuel trims.
I understand in Closed Loop, the oxygen sensors come into play but at a cold idle what all is being used?
MAF? FRPT? TPS?
I have screaming high short term fuel trims at cold idle (40/60). Unplugging maf sensor has little impact but plugging it back in kills it. Unplugging/plugging back in fuel pressure sensor has little impact. What else is the PCM using to calculate this trim?
I understand in Closed Loop, the oxygen sensors come into play but at a cold idle what all is being used?
MAF? FRPT? TPS?
I have screaming high short term fuel trims at cold idle (40/60). Unplugging maf sensor has little impact but plugging it back in kills it. Unplugging/plugging back in fuel pressure sensor has little impact. What else is the PCM using to calculate this trim?
