Quote:
Originally Posted by MetroMPG
Re: your Aveo...
I would really love to know what you had them correct. I assume these were items that affected fuel economy. Might be extremely helpful to other Aveo owners.
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I had non-fuel related issues like faulty front brake rotors (eventually replaced), a faulty fuel tank wiring seal (where the wires entered the body of the vehicle) that allowed a mouse to take up residence (a $1500 story) etc.
The biggest fuel related thing was something to do with the oxygen sensor. They eventually replaced it at no charge and it did help. I'll be replacing it again with a heated oxygen sensor when I do my personal upgrades.
The next big thing was the deceleration fuel shutoff. It would NOT go into DFS if the air conditioning was on (I think because the throttle position was advanced) and we bought the Aveo for two reasons air conditioning for my wife and fuel mileage for me. Since we HAD to have the AC on, I lost part of the fuel economy that would be gained with DFS. I finally got them to 'upgrade' the programming and after that the DFS would come on when the AC was on.
The Aveo DFS 'programming rules' are a joke. The DFS units I build myself (for carbureted and EFI) work much better. I'll be upgrading this too, once I can get to the car.