Better Mileage Audi A6

[Mark Rosenkrantz]

Thermostat is easy to verify operation, just saying a too cold engine will burn more fuel.  And I was driving....  Lol

Mark Rosenkrantz
Typos sent from my iPad

On Aug 25, 2011, at 6:27 PM, Tony Hoffman <auditony at gmail.com> wrote:

> Definately second the CTS. They go bad fairly frequently on these cars. The Thermostat is located such that the timing belt has to come off, so it's a pretty invfolved job.
>  
> And, I can't really imagine the cats causing that milage, unless they are severly plugged up. In which case, you would also have a power issue.
>  
> As Mark suggested, if you can get your hands on VAG-COM in your area that should be a big help. You can even watch the flow rate of the air flow meter.
>  
> Tony
> 
> On Thu, Aug 25, 2011 at 4:26 PM, Mark Rosenkrantz <speedracer.mark at gmail.com> wrote:
> You'd have to reprogram the ECU for a cat delete, and the rear sensors (post cat) can be deleted.  The reason there are 4 sensors is to verify and optimize cat performance.  Obviously this is an illegal mod for a street car, but the chip tuners can accommodate.  Is the engine burning oil?  Vag-com can be used to watch the sensor inputs.  BTW, I'd put the coolant temp sensor and thermostat at the top of the list, as well as dirty or worn injector.  Techron is your easy friend there.
> Mark Rosenkrantz
> Typos sent from my BlackBerry.