Arkhangelsk1989 Posted March 24, 2021 Share Posted March 24, 2021 Hello my car is a 2007 fiesta zetec s 1.6 petrol, I am trying too find a hissing noise that occurs when I accelerate and wanted too see if it was definitely a vacuum leak. I have plugged an obd2 reader in and at idle the short fuel trim is going between 0 and - 5. Then when I rev the car up too around 1500 rpm the short fuel trim level is at between 0 and +5. Is this normal?. Also the spark advance is around 6 degrees at idle and goes up too about 33 at 1500 rpm. Also the long term fuel trim at idle is between - 3 and - 1 and goes too about - 0.5 at 1500 rpm Any help would be really appreciated Quote Link to comment Share on other sites More sharing options...
Arkhangelsk1989 Posted March 26, 2021 Author Share Posted March 26, 2021 Anyone? Quote Link to comment Share on other sites More sharing options...
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