Did you get any good answers?
How about dead/dying/faulty O2 sensors? Could case you to run super rich.
dead/dying/faulty Cat converter? I'd suspect you'd notice a performance
fade too though.
Jay W
505/287 Dakota
Bill Nissley wrote:
> I had a sudden decrease in my gas mileage recently. I had been
> consistently getting 14-14.7 mpg, now I am getting 13-13.5 mpg. A tank
> was lasting me about 10 days, and now that is down to 8. The truck still
> seems to perform the same, but I don't push it very hard so I don't know
> if I'd notice a slight difference in performance.
>
> The only 2 things that I can relate it to was an oil change a Jiffy Lube
> that I had done because I was going on a trip to Arizona (750 miles
> round trip) and I didn't have time to take care of it. The second thing
> was the trip itself. I left the day after the service. That is where I
> first noticed the low MPG. It was lower on the trip than what I had been
> getting around town. The outside temperature was in the low 100s, but no
> overheating at all even with the air conditioner on the whole way. The
> Viper fan seemed to work really well.
>
> Those 2 things may be coincidental, but since then I have had the
> problem. Anyone have any thoughts?
>
> Bill
> http://www.dakota-truck.net/profiles/dakota/Ah0EiM5qG@xcE/profile.htm
>
>
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