Dear Friends, I have a 940 turbo wagon, 1,995. I did a major tune up on it and everything is fine, we even did a major intake system clean up, but its still making 15 mpg. I know this car should be doing 20-22 mpg so I wonder if reseting the computer will do any good? Someone mentioned here that this computer sometimes keeps sending a rich fuel even if I am not driving at high speed all the times.

Please help me find out if reseting it will help at all, and if this is the one I can do it from the modules on the engine compartment

 

Either pull the fuse for the Engine Managment system or disconnect the Battery for 15 minutes or so.

 

where is that fuse????
So nothing to do with the diagnostic unit?

 

I forget which one it is. It might be fuse #1 but not sure.
The fuse box is either under the Radio or in the side of the Dash.

The panel tells you which fuse os for what.

 

Already played with the diagnosis unit and the only code was 2-2-3, idle valve signal. does that has anything to do with my high mpg? when I had the tune up made, they cleaned all that stuff completely, please HELP !!!!!!! I dont want to sell the car, but 15mpg is something I can not afford

 

If the TPS is out of adjustment that will mess with the idle to.

 

tech, what is the TPS?

 

That was me. It was what all the techs at my dad's dealership used to tell me....something about how running it at high RPMS setts the computer off somehow...I just knoded with glazed over eyes and let them reset to problem....i have no idea what the issue was.

 

TPS= Throttle Position Sensor