Quote:
Originally Posted by j.fro
I hooked up my Durametric today to look at camshaft deviation specs. Do these look good? Is there anything else I should check?
2000 Boxster S, 167,000 miles, original IMS:
Bank 1: -5.63
Bank 2: -6.5
remained unchanged regardless of RPM
1999 Carrera 4, 77,000 miles, just replaced IMS w/LNE:
Bank 1: -6.56
Bank 2: - 4.39
remained unchanged regardless of RPM
I was looking to get air-fuel ratios, but couldn't find that function in Durametric... am I missing something?
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The Durametric does not list a read out for air fuel rations per se, but uses Porsche's technique of measuring fuel trims under the "actual values":
In Porsche terminology, you want to look at "adaption values, and it works this way:
System description
The adaptation values can be read out with the PIWIS or Durametric system.
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 for cylinders 1 - 3
FR2 = Oxygen sensor for cylinders 4 - 6
My understanding of range 1 and range 2 is that range 1 is the reading before the DME adapts the mixture and range 2 is after adaption.
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