Quote:
Originally Posted by redpoint5
Your car should be throwing a check engine light if there is an issue with anything relating to emissions. Running rich would be one of those conditions that should trigger a CEL.
You will use the short and long term fuel trim gauges along with the air fuel ratio to evaluate a vacuum leak or other problem with air and fuel delivery.
Snippet from this website:
Note that it's normal for an engine to constantly alternate between running a slightly rich to slightly lean air fuel ratio as it constantly adjusts around stoich 14.7:1 |
The LTFT and STFT are both fine and I don't have CEL either. The STFT bounce around but it rarely gets over +/- 2%. It will be great if Torque Pro can provide me the average of both fuel trims for my trip. Thus I can compare these with the mpg.