Quote:
Originally Posted by JFP in PA
Your short term fuel trims are out of spec by a mile. For example, an "in spec" "long term" FRA trim would be around 1.0 +/- 0.1 and an in spec "idle range" fuel trim would be in the range 0.00 +/- .2. There is definitely a leak issue somewhere, or your fuel system has an issue.....
System description
The adaptation values can be read out with the Porsche System Tester 2.
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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It would appear my efforts have paid off. I believe replacing the gasket on the throttle body sealed it. A smoke test revealed that there was no vacuum leak and taking to a well know Porsche garage validated the numbers are good. Thanks everyone for reviewing my information and providing analysis/suggestions. Jim