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

[quickaudi at aol.com]

K, I'm fairly sure that my temp sensors (I've replaced three with OEM parts) nor my thermostat, though I could always be wrong.
Other than those, what else could cause me to be running permanently rich?  Oh yeah, something that I thought about: if I have an air leak somewhere, would the engine combat that by adding extra fuel to the mix?  The reason I ask is because in the morning, whenever I start up the car, it will stumble whenever I put it in drive or reverse and act like it will die (revs hit lower than 400), then it is fine the rest of the drive.  In fact, the idle will either be fine or high, depending on how the car feels, I guess.
So, what causes a car to run rich, and where should I check for an air leak?
 
 
Joel
'90 V8q
'86 5kcstq