[V8] Re: cold weather killing gas mileage (AHA!!!)

[Kneale Brownson]

If the operating temperature is fluctuating at steady driving, you have a
partially nonfunctional thermostat.  It shouldn't run "warmer when it's
warm and cooler when it's cool".  

At 03:54 PM 5/1/2005 -0400, quickaudi at aol.com wrote:

>I'll check my thermostat, but I'm sure it's working.  I replaced it last 
>year, and the engine temp is cooler when it is cool and warmer when it is 
>warm.  It usually sits around the 1/4 mark (75 C?) when it is cold and 
>halfway between 75 and 100 when it is warm/hot out.  
>I checked the voltage to the OXS sensor, and it was fine for the heater 
>circuit.  The microfiche said 10-12 volts, but I was getting 13.7 volts.  
>That good or bad?  Also, the fuse had voltage, and the places between the 
>fuel pump and the fuse that should have continuity did.  I'm super stumped 
>now.  I still have the rich condition, so if anyone has any help to offer, 
>let me know.
>