I have a SAAB 9-3 2.0t and would like to know if I can reset the average fuel useage shown on the computer. I assumed it would reset when I tanked up but this is not the case. Also the owners manual I have for this car is in French and would like to know if there is available on the internet a downloadable english version. Thanks
You only need to have the SID display the information (average fuel usage) and presse the CLEAR button for a few seconds (hold it) and it will reset to 0. When you start driving it will start avereging again. Any settins displayed with a stricked 0 can mean average and can be reset that way.
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www.fixya.com/cars/t25565243-2002_saab_fuel_reset_switchMar 13, 2015 - Where is the fuel pump reset switch for a Saab 2002 ... side of engine by firewall passenger side 1/2 way up bock with single wire going to it.
Its very simple. If the gauge is showing half full then fill the tank and see how much fuel it takes. If the amount you add is approximately 50 percent of the fuel tank capacity then you know the fuel gauge is accurate . In that case the computer is giving an inaccurate reading and should be ignored. All you need is an accurate fuel gauge - it does not matter a row of beans what the computer says if the fuel gauge is reading correctly.
I've never really heard of an air lock in a fuel injection system. The computer opens the injectors and the electric pump in the tank pushes the fuel to the engine. Have you checked fuel pressure at the injectors with a gauge to see if it is normal ?
Sorry if this gets posted twice. I have a 95 Saab 900, which I just acquired. I can get only about 4 or 5 gallons in at a time. The best analysis I found was this one where the man pinpoints a stuck valve in the gas tank, and tells of what he did to address it.: http://www.quasimotors.com/9_5_gas_fill_prob.htm
If you are on your original fuel pump, be advised that they are known to last, on average, about 100,000 miles. Another common fault, besides that and the direct ignition cassette you have already mentioned, is the crankshaft position sensor. The prelude to total failure of this component may prevent starting or cause stalling and rough running. The ECU needs the signal from this sensor to know when to signal the DIC to fire a particular plug.
To replace the fuel pump from above, without dropping the tank, you must cut your own access hole. Here is a complete illustrated tutorial for the procedure, including replacement of the pump insert itself.