What is air fuel correction?

What is air fuel correction?

A/F Correction #1 Simply A/F Corr #1 is the amount in percentage of the instant fuel trimming needed to target an AFR, usually stoichmetric, (14.5-14.7) in closed loop. This is based the MAF Voltage and the static MAF Scale/Estimated Air Mass (measure in grams/sec) inputted for that specific MAF voltage.

What should AF correction be at?

For the FA values -16 to +16 are acceptable (sourced by speaking to Ian at Maperformance who spoke with cobb), however values of -8 to +8 may be considered normal. Values outside of these ranges are commonly a dirty MAF or tune issues. It is normal to see values outside of these ranges while the car is not under load.

What should my AF correction 1 mean?

AF Correction 1 (AF Correction 1) -> Short-term (immediate) fueling correction in closed loop based on input from the front oxygen sensor. This is a percentage correction of the injector pulse width. Positive values indicate fuel is being added as a result of the correction.

What does high af learning mean?

A/F Learning 1 Positive numbers indicate that fuel is being added. Negative numbers indicate that fuel is being removed. The closer to zero the better, but generally, the acceptable range would be +/- 10%. Negative corrections beyond 10% mean the ECU is pulling lots of fuel.

What is fine knock WRX?

Fine knock learning is your ecu adjusting timing based on perceived knock events. Again, similar to fbk. For example if your sensor picks up a consistent fbk of -1.41 you may then see fkl of -1.41, then -. 7x, -.

What causes negative af learning?

A negative AF Learning one means that the ECU is pulling fuel. When I noticed mine was creeping up to around -15 I changed out my filter and that brought it back down to normal ranges 0 to -5. I figured less air to the engine would mean less fuel needed and the filter was dirty.

What is negative feedback knock?

Feedback Knock Correction is the default correction used by the ECU. The ECU will “respond” with this monitor by immediately removing timing and then slowly decaying the value back to zero assuming no further noise is detected.

Do you need to tune WRX after cold air intake?

For a quick answer – no, you don’t need to tune your car after installing a cold air intake. Tuning your car is expensive and for doing it only to optimize a cold air intake is not worth the money.

Is feedback knock okay?

In general, we consider Feedback Knock Correction ~-2.5 degrees or less to be “normal” and not of major concern. If DAM is below the ideal value and there are corrections beyond -2.5, this is good reason for further inspection.

What is dam on a WRX?

6. If your dynamic advance multiplier (DAM) drops from 1.0 (for 2.5L Subarus) or 16 (for 2.0L Subarus). Keep in mind that some maps start the DAM at a lower value when you reflash or reset the ECU and this is normal and not a cause for concern – will eventually learn up to its max if all is good.

What is dam on Cobb Accessport?

DAM represents a global adjustment to ignition timing. If this value is anything less than ideal, it’s a quick indicator something isn’t right (unless immediately following an ECU reset/reflash). On an 02-05 WRX the values will range from 1 to 16, 16 being ideal.

What is dam WRX?

If your dynamic advance multiplier (DAM) drops from 1.0 (for 2.5L Subarus) or 16 (for 2.0L Subarus). Keep in mind that some maps start the DAM at a lower value when you reflash or reset the ECU and this is normal and not a cause for concern – will eventually learn up to its max if all is good.

What is Afaf correction 1 fuel injection?

AF Correction 1 (AF Correction 1) -> Short-term (immediate) fueling correction in closed loop based on input from the front oxygen sensor. This is a percentage correction of the injector pulse width. Positive values indicate fuel is being added as a result of the correction. Negative values indicate fuel is being removed.

What is Af correction 3 on a fuel pump?

AF Correction 3 (AF Correction 3) -> Short-term (immediate) fueling correction in closed loop based on input from the rear oxygen sensor. This is a percentage correction of the closed loop fueling target.

What does AF 3 mean on a fuel gauge?

AF Correction 3 (AF Correction 3) -> Short-term (immediate) fueling correction in closed loop based on input from the rear oxygen sensor. This is a percentage correction of the closed loop fueling target. Positive values indicate fuel is being added as a result of the correction.

What are the different types of exhaust gas temperature correction?

Exhaust Gas Temperature (Exh Gas Temp) -> Exhaust gas temperature (EGT) based on the EGT sensor located in the uppipe. Exhaust Gas Temperature Voltage DIRECT (EGT Volts Direct) -> Exhaust Gas Temperature sensor output voltage direct. Feedback Knock Correction (Feedback Knock) -> This is a correction applied to dynamic advance based on knock.