Quote:
Originally Posted by ike84
I have been trying to find definite descriptions of these terms for a while and have had limited luck. From what I have cobbled together from the interwebs is this;
These are all long term fuel trim adaptations.
rkat is idle adaptation and should be at 0.
Fra is running adaptation and should be at 1.
Frau/frao are different load range for the running adaptation. Cannot find defined rpm or load ranges, but they should also be at 1.
Here's the best single website I have found about this.
https://www.callasrennsport.com/blog/porsche-986-996-987-997-fuel-trim-information
In other words, your fuel trims are perfect!
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Thank you for your input and good link.
You are correct, in theory based on the numbers my engine is running perfectly, but I did a run with the Durametric attached and the numbers NEVER change, so no adaptation at all, and this can ot be correct.
I did some searching and found this discussion from some years back where someone in Germany has the same problem with a racing car that has been modified in very much the same way - but the discussion was never concluded and he never posted the results or fix
https://www.renntech.org/topic/53016-afr-values-not-adapting-rich-injection-time-too-long/