Q: Loss of mpg and power

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My truck used to get around 18-20 miles to the gallon now its half that if not worse, last fill up to empty it went 180 miles on a 26 gallon tank. The truck also has issues accelerating and when doing so smells like fuel. Im Pretty handy myself and ive been working on cars and trucks ofr about a half a dozen years and still cant seem to figure it out. I have replaced the map sensor, egr valve, o2 sensor. Pls help

My car has 160000 miles.
My car has an automatic transmission.

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