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Old 09-22-2019, 09:39 PM
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Lester Lugnut Lester Lugnut is offline
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Lester Lugnut Lester Lugnut is offline
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Join Date: Feb 2014
Location: U. S. A.
Posts: 1,014
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I would pull and clean the Mass Air flow Sensor - known as MAF sensor. Did not see it in pages 1-4 - maybe I missed it.

This device does not need to be deteriorate enough to throw a code before it causes MPG to suffer.

If not handled already - consider new air filter. Some may not agree as your vehicle has only 15000 miles, but age also comes into play. Your 4R is 6 yrs. old.

Update - I wanted to include a parts sketch of where the MAF sensor is located on the 5th Gen 4R - #22204 in pic - air filter housing - upper part of pic
Attached Images
5th Generation Poor Fuel Efficiency Causes?-5th-gen-4runner-1gr-fe-maf-sensor-22204-png 
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2015 2WD Toyota Tacoma Prerunner V6 SR5 1GR-FE 236HP VVT-i
2014 2WD Toyota 4Runner SR5 1GR-FE 254 HP Dual VVT-i
2006 Toyota Avalon 3.5l automatic 2GR-RE Dual VVT-i
1991 Mercedes-Benz 300-SEL M103
1975 Kawasaki 900 Z1-B

Last edited by Lester Lugnut; 09-22-2019 at 10:55 PM.
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