Re: Poor MPG - Saab 9-3SS Bulletin Board - Saabnet.com
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Re: Poor MPG
Posted by John J Myers (more from John J Myers) on Wed, 5 Oct 2016 15:45:57
In Reply to: Poor MPG, Willet Hossfeld, Mon, 19 Sep 2016 11:37:39
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A cheap OBD2 scanner should be able to show fuel trim. If it's running a little rich my $89 Matco scanner would show that. A Tech2 would show mass airflow deviation from calculated. (difference between MAF reading and speed density calculation). Since you recently replaced the plugs you could see changes due to the fact that worn plugs actually send a reduced ionization signal to Trionic (also known as knock detection). You may be overly concerned over the lack of accuracy of your computers. We old people would write down our mileage and numbers from the gas pump and actually do the math. Yes I am a smartass, but I earned the right to be so.
posted by 24.251.2...
Posts in this Thread:
- Poor MPG, Willet Hossfeld, Mon, 19 Sep 2016 11:37:39
- Re: Poor MPG, John J Myers, Wed, 5 Oct 2016 15:45:57 <-- Viewing This Message
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