Is there anyway of......

[Mother]

Using the Durametric cable/software parameters to figure out what the AFR is?

Edited February 27, 2010 by Mother

[wvicary]

Monitor the fuel trim but there is no actual value that states "Rich" or "Lean" like some domestic scan tools display.

[Mother]

Monitor the fuel trim but there is no actual value that states "Rich" or "Lean" like some domestic scan tools display.

I do not see any fuel trim logging for the durametric?

[Loren]

The adaptation values can be read out with the Porsche System Tester 2 and I suspect Durametric can read the same.

The key to the adaptation values is as follows:

RKAT = Adaptation in range close to idle - Cylinders 1 - 3

RKAT2 = Adaptation in range close to idle - Cylinders 4 - 6

FRAU = Adaptation in lower load range - Cylinders 1 - 3

FRAU2 = Adaptation in lower load range - Cylinders 4 - 6

FRAO = Adaptation in upper load range - Cylinders 1 - 3

FRAO2 = Adaptation in upper load range - Cylinders 4 - 6

FR = Oxygen sensor - cylinders 1 - 3

FR2 = Oxygen sensor - cylinders 4 - 6

[Mother]

Is there anywhere to find info on the above adaptations in common language what they are showing you.?

[Loren]

The Porsche PST2 can display the following actual values and I think the Durametric can too:

Actual Values

Values present at the moment of the test can be read out with this menu item.

The following values can be called up:

- Engine rpm

- Load signal

- Air mass

- Mass air flow sensor

- Vehicle speed

- Voltage

- Intake air temperature

- Engine temperature

- Throttle valve angle

- Ignition angle

- Spec. air mass

- Spec. air adaptation

- Ambient pressure

- Injection time

- Exhaust temperature after TWC (three-way catalytic converter) (value calculated by ECM)

- Oil temperature

- Oxygen sensing, cylinders 1 - 3

- Oxygen sensing, cylinders 4 - 6

- Adaptation value, area 2, cylinders 1 - 3 (FRA)

- Adaptation value, area 2, cylinders 4 - 6 (FRA2)

- Adaptation value, area I, cylinders 1 - 3 (TRA)

- Adaptation value, area I, cylinders 4 - 6 (TRA2)

- Voltage, oxygen sensor ahead of TWC, cylinders 1 - 3

- Voltage, oxygen sensor 2 ahead of TWC, cylinders 4 - 6

- Voltage, oxygen sensor after TWC, cylinders 1 - 3

- Voltage, oxygen sensor 2 after TWC, cylinders 4 - 6

- Trip counter

- Time counter after engine start-up

- Camshaft position 1 deviation (cylinders 1 - 3)

- Camshaft position 2 deviation (cylinde rs 4 - 6)

- Rough running threshold value

- Rough running

- Segment A

- Segment B

- Learning progress of sensor wheel adaptation

- Misfire detection

- Engine compartment temperature

- Oxygen sensor heating resistance after TWC

- Oxygen sensor heating resistance ahead of TWC

[Mother]

I believe you are right on the durametric readings, but was concerned with:

- Adaptation value, area 2, cylinders 1 - 3 (FRA)

- Adaptation value, area 2, cylinders 4 - 6 (FRA2)

- Adaptation value, area I, cylinders 1 - 3 (TRA)

- Adaptation value, area I, cylinders 4 - 6 (TRA2)

What do they represent?

I am concerned about the ones that could give me a indication of AFR and would think that the O2 reading voltage would be one of them in the calculation.