Thanks for the reply. Since I don't have a laptop computer, PC based was 
not an option. I was trying to keep cost around under $150, The 
Scangauge II is still inviting, in that the fuel mileage is 
instantaneous available, and once you have a little background data, 
would recognize a problem. In the case of the Cougar which has 
instantaneous and trip mileage available, if I would have recognized the 
fuel mileage drop as being an engine issue (running perfectly otherwise) 
, instead of in error blaming the alcohol in the gasoline, the issue 
would have been fixed a long time ago.  The cost  looks like this 12,000 
miles/30 MPG  x $2.50/gallon x 15% drop in MPG =  $150. That would pay 
for the Scangauge II. Unfortunately our Ford Bronco full size SUV only 
gets driven usually 1000 miles per year, it's hard to justify cost for 
it. I was hoping to find a scanner that would have access to the 
non-standard OBDII info. The ScangaugeII is now available with 
programming (Xgauge), to allow some of this, but appears that there will 
be more than a little amount of research and programming time needed, 
where I was hoping this work already done. :)

Vitaliy wrote:
> Carl Denk wrote:
>   
>> Had a 2002 Mercury Cougar with a 2.5L. V-6 that was getting less than
>> great fuel mileage (27 vs. 32 MPG highway) for some time, thought it was
>> the alcohol in the gasoline, since that came about the same time to the
>> area. Recently got the check engine light, scanned with the AutoXray
>> Ezlink scanner I have had for some years, replaced the EGR valve, but
>> the light and P0401 code came back in a week. Tracked the problem down
>> to a sticky DPFE (Differential pressure feedback EGR) sensor, which I
>> replaced. The fuel mileage came back to what we have known. Anyone with
>> a 2000 - 2003 Ford should check this out.
>>
>> The valve is available for $35 from your local parts store, and $75 from
>> Ford, but I have heard of issues of connectors not matching, etc. on the
>> non-Ford parts.
>>
>> I was looking into buying a new scan tool, and the Scantool.net
>> "Scangauge II" caught my attention. It is small, plugs into the OBDII
>> connector, and in addition to scanning for codes, provides fuel mileage
>> (both average, and instantaneous) , miles to empty, etc. Does it also
>> provide sensor readings, like the DPFE voltage, and other sensors? My
>> current scanner doesn't provide some of the sensor readings. Would have
>> helped with the diagnosis. The sensor is buried behind the engine, and
>> the connector doesn't lend it self to breaking in.  If the Scangauge II
>> doesn't provide the necessary info, is there suggestions on something
>> that will, without getting into the $300+ range.
>>     
>
> DPFE is not part of the standard OBDII PID set. If you can find out what the 
> mfr specific mode/PID is, you can add it using XGauge:
>
> http://scangauge.com/support/xgauge.shtml
>
> If you don't mind using a PC based scan tool, ScanXL supports hundreds of 
> Ford-specific PIDs:
>
> http://www.palmerperformance.com/support/supported_vehicles/ford_enhanced.php
>
> Best regards,
>
> Vitaliy Maksimov
> ScanTool.net, LLC
> +1 623 582-2366
> http://www.scantool.net 
>
>   
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